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List theplanetlovelife's Instagram Happy #sharkweek 💙🌊🦈
Our shark conservation bracelets are made from 100% salvaged fishing nets & ropes! Proceeds fund beach cleanup projects and help spread marine debris awareness ♻️🌊 #savethesharks www.PlanetaLoveLife.com
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#shark #sharks #sharkconservation #ilovesharks #sharklove #sharklife #sharkeducation #sharksaresexy #sharkteeth #sharktooth #megalodon #sharkfishing #sharkdiving #megalodontooth #fossil #fossilhunter 1567489488572221513_597891764

Happy #sharkweek💙🌊🦈 Our shark conservation bracelets are made from 100% salvaged fishing nets & ropes! Proceeds fund beach cleanup projects and help spread marine debris awareness ♻️🌊 #savethesharkswww.PlanetaLoveLife.com . #shark #sharks #sharkconservation #ilovesharks #sharklove #sharklife #sharkeducation #sharksaresexy #sharkteeth #sharktooth #megalodon #sharkfishing #sharkdiving #megalodontooth #fossil #fossilhunter

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List bnhamiltonnj's Instagram Please Be Nice to Sharks! Did you know that every year people kill around 100 million sharks! Celebrate Shark Week by reading and learning about one of the most misunderstood animals in the world 🌍 #sharkweek #sharks #sharkconservation #fisharefriends #funfacts #nationalgeographic @natgeo @dkbooks 1567487854715513651_2292660408

Please Be Nice to Sharks! Did you know that every year people kill around 100 million sharks! Celebrate Shark Week by reading and learning about one of the most misunderstood animals in the world 🌍 #sharkweek #sharks #sharkconservation #fisharefriends #funfacts #nationalgeographic@natgeo @dkbooks

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List luxuryecotravel's Instagram We all need to do our part to protect these beautiful creatures and their habitat. Approximately 50 million sharks are caught unintentionally as bycatch by commercial fisheries. To help, never eat shark products and stop eating seafood! 1567478395167314375_3137668536

We all need to do our part to protect these beautiful creatures and their habitat. Approximately 50 million sharks are caught unintentionally as bycatch by commercial fisheries. To help, never eat shark products and stop eating seafood!

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List charmcitychick's Instagram Boo to sideways videos but here's today's adorable #shark fact about one of my favorite species!
Not only is the zebra shark beautiful and chill as hell, a recent case at an aquarium in Australia proved she can reproduce asexually. She's a strong woman and she (literally) don't need no man. Hello, #womancrush! 💪🏼🚺🦈
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#zebrashark #sharkfacts #handlettering #handwriting #calligraphy #grrrlarmy #sharks #sharkconservation #savethesharks #sharkweek #strongfemale #feminist #science #giveashitaboutnature #womeninscience #wcw #womancrushwednesday 1567456856930822022_51241031

Boo to sideways videos but here's today's adorable #sharkfact about one of my favorite species! Not only is the zebra shark beautiful and chill as hell, a recent case at an aquarium in Australia proved she can reproduce asexually. She's a strong woman and she (literally) don't need no man. Hello, #womancrush! 💪🏼🚺🦈 . #zebrashark #sharkfacts #handlettering #handwriting #calligraphy #grrrlarmy #sharks #sharkconservation #savethesharks #sharkweek #strongfemale #feminist #science #giveashitaboutnature #womeninscience #wcw #womancrushwednesday

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List mawrgun's Instagram Shark Week: a time of fear mongering, over dramatization , pseudoscience and inaccurate depictions of sharks as man killing monsters. As said by many shark lovers : over 100 million sharks are brutally murdered by humans EVERY YEAR.  Who are the real monsters here? •
To love sharks, is not give into the hype instilled before our eyes on the TV screen, or to be entertained by the lies and falsities portrayed on the media to get a good "ooohhh-ahhhhh, sharp teeth, so much blood" out of you. •
To love sharks, is to experience them first hand, to truly care about the significance of their existence, the extremely important role they play in the health of our oceans, to immerse yourself in their world and to fully respect them. But Shark Week still falls EXTREAMLY SHORT to what they deserve.
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Shark week undoubtably over the past few years they slowly begin to interject more scientifically sound conservation efforts, exposure of the mass slaughter of sharks and the beauty and grace of these creature in the wild. WE NEED MORE EDUCATION! So many amazing scientists, artists, cinematographers and photographers and teachers out there fighting the fight for shark justice. We need more of you! @sharkgirlmadison  @biminisharklab @biminisharkgirl  @ryanwaltonofficial @sharkcon_2017 @sharkeducation @oceanramsey @conversationocean @sharkbytesapp @sharkteamone @sharktagging @sharkconservancy and so many more.
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However I will remain skeptical until they prove to us they're worth our time by changing their line-up to meet the ACTIAL shark lovers point of view without blurring the line of fear mongering for more views.... be curious, ask questions and never believe what the media says as true until you DO YOUR OWN RESEARCH or witness them yourself being all beautiful and majestic making you cry during a shark dive. Lol. #sharksaresexy 💙🦈
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::::End rant::::
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Use code "MOSHARKS" for 10% off @theplanetlovelife merch. Yes, that's @baldmonk4's butt at the end. 😜
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#moseas #mosharks #ilovesharks #sharkweek @sharkweek #sharkconservation #sharkeducation #divingwithsharks #oceanwarrior #bluemind #girlswhodive #diving #floridadiving #lemonsharkdive #scuba #ilovesharks #conversationocean 1567438174911920806_17800369

Shark Week: a time of fear mongering, over dramatization , pseudoscience and inaccurate depictions of sharks as man killing monsters. As said by many shark lovers : over 100 million sharks are brutally murdered by humans EVERY YEAR. Who are the real monsters here? • To love sharks, is not give into the hype instilled before our eyes on the TV screen, or to be entertained by the lies and falsities portrayed on the media to get a good "ooohhh-ahhhhh, sharp teeth, so much blood" out of you. • To love sharks, is to experience them first hand, to truly care about the significance of their existence, the extremely important role they play in the health of our oceans, to immerse yourself in their world and to fully respect them. But Shark Week still falls EXTREAMLY SHORT to what they deserve. • Shark week undoubtably over the past few years they slowly begin to interject more scientifically sound conservation efforts, exposure of the mass slaughter of sharks and the beauty and grace of these creature in the wild. WE NEED MORE EDUCATION! So many amazing scientists, artists, cinematographers and photographers and teachers out there fighting the fight for shark justice. We need more of you! @sharkgirlmadison @biminisharklab @biminisharkgirl @ryanwaltonofficial @sharkcon_2017 @sharkeducation @oceanramsey @conversationocean @sharkbytesapp @sharkteamone @sharktagging @sharkconservancy and so many more. • However I will remain skeptical until they prove to us they're worth our time by changing their line-up to meet the ACTIAL shark lovers point of view without blurring the line of fear mongering for more views.... be curious, ask questions and never believe what the media says as true until you DO YOUR OWN RESEARCH or witness them yourself being all beautiful and majestic making you cry during a shark dive. Lol. #sharksaresexy💙🦈 • ::::End rant:::: • Use code "MOSHARKS" for 10% off @theplanetlovelife merch. Yes, that's @baldmonk4's butt at the end. 😜 • #moseas #mosharks #ilovesharks #sharkweek@sharkweek #sharkconservation #sharkeducation #divingwithsharks #oceanwarrior #bluemind #girlswhodive #diving #floridadiving #lemonsharkdive #scuba #ilovesharks #conversationocean

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List ecoceanic's Instagram 🦈💙 When you're a crazy dog & shark lady 💛🐕 #ahoy #captaindoggos #doglady #sharklady #sharkweek #sharkdogs #staysalty #bamboozled 1567428515003345256_4817574800

🦈💙 When you're a crazy dog & shark lady 💛🐕 #ahoy #captaindoggos #doglady #sharklady #sharkweek #sharkdogs #staysalty #bamboozled

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List underseahunter's Instagram During this Shark Week we need to talk also about Shark Conservation. There are several Projects working to ensure the world's Sharks are protected for future generations. Underseahunter support passionate and innovative researchers, conservationists and educators across the globe, by helping tell important scientific and environmental stories. Some projects like @mission_blue @natgeopristineseas @turtleislandrestorationnetwork @nakaweproject are dedicated to learning about sharks and rays and sharing that knowledge to all of us!  Follow them and answer your questions such as why is it important to conserve sharks, what are the threats to sharks, and how you can make a small but significant difference to the future of sharks! 
#DiveWild #CocosIsland #Sharks #SharkWeek #SharkWeek2017 #Conservation #SharkConservation #Protect #Wildlife #CostaRica 
Photo memory by @shmulikblum with @regisunday from @nakaweproject at #IslaDelCoco in 2012 1567427659222610128_1836123837

During this Shark Week we need to talk also about Shark Conservation. There are several Projects working to ensure the world's Sharks are protected for future generations. Underseahunter support passionate and innovative researchers, conservationists and educators across the globe, by helping tell important scientific and environmental stories. Some projects like @mission_blue @natgeopristineseas @turtleislandrestorationnetwork @nakaweproject are dedicated to learning about sharks and rays and sharing that knowledge to all of us! Follow them and answer your questions such as why is it important to conserve sharks, what are the threats to sharks, and how you can make a small but significant difference to the future of sharks! #divewild #cocosisland #sharks #sharkweek #sharkweek2017 #conservation #SharkConservation #protect #wildlife #costarica Photo memory by @shmulikblum with @regisunday from @nakaweproject at #isladelcocoin 2012

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List ryanwaltonofficial's Instagram Want to swim with sharks?  Summer's #pelagicsharks have been amazing, like this #silkyshark swimming between our Snorkelers! Contact me to book your spot to swim with me and the #sharks ! .
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#sharkconservation #educate #inspire #morivate #coexist #sharkweek #potd #shark #sharkdiving #travel #adventure #saveoursharks #divelife #snorkel #freedive #science #research #ourfuture #protectourseas #saveourseas #oceansmatter 1567410725650805464_366359570

Want to swim with sharks? Summer's #pelagicsharkshave been amazing, like this #silkysharkswimming between our Snorkelers! Contact me to book your spot to swim with me and the #sharks! . . #sharkconservation #educate #inspire #morivate #coexist #sharkweek #potd #shark #sharkdiving #travel #adventure #saveoursharks #divelife #snorkel #freedive #science #research #ourfuture #protectourseas #saveourseas #oceansmatter

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List finalliance's Instagram Great Message from @oceana!! #Repost @nina (@get_repost)
#stopsharkfinning #stopsharkfishing #endfinning #savesharks #sharkadvocate #sharkconservation ・・・
Every year, fins from as many as 73 million sharks end up in the global shark fin trade and it’s on us to do something about it. Tune in today as I takeover @Oceana’s Instagram
 to share more about why we’re calling for a nationwide ban on the buying and selling of shark fins in the U.S. Together, we can protect sharks and the health of our oceans. #FinBanNow 📷: @petezuc Pete Zuccarini / @sharkweek http://bit.ly/2trlu0m 1567404551912717037_4841658475

Great Message from @oceana!! #repost@nina (@get_repost) #stopsharkfinning #stopsharkfishing #endfinning #savesharks #sharkadvocate #sharkconservation ・・・ Every year, fins from as many as 73 million sharks end up in the global shark fin trade and it’s on us to do something about it. Tune in today as I takeover @Oceana’s Instagram to share more about why we’re calling for a nationwide ban on the buying and selling of shark fins in the U.S. Together, we can protect sharks and the health of our oceans. #finbannow📷: @petezuc Pete Zuccarini / @sharkweek http://bit.ly/2trlu0m

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List sharks_are_awesome1's Instagram It's @biminisharkgirl and today I'm going to talk a bit out @sharkeducation , the nonprofit I started in 2012 with the goal of creating the next generation of shark advocates through education, outreach and adventure. In this photo I am showing a young student how to take a tissue sample during a scientific work up. This is part of our partnership with the Guy Harvey Research Institute to get kids on the water and participating in STEM science with sharks. This tissue sample ( like clipping your fingernails) can tell scientists about the sharks DNA, family tree and diet! If we want to protect sharks, we must know about them, their life history traits, their diet, their habitat use and migration paterns. Catching, tagging and releasing sharks can drastically increase our understanding, which leads to better management and conservation practices. Our goal is to give kids the opportunity to participate in real science, so are inspired to possibly pursue this as a career ( especially girls-women do this too) and to have understand what shark science involves and why we do it. 
#sharks #sharkweek #sharkscience #savesharks #sharkresearch #sharks4kids #sharkeducation #saveoursharks #likeagirl #sharkgirls #sharktagging #sharkconservation #ilovesharks 1567408206500648811_1454740898

It's @biminisharkgirl and today I'm going to talk a bit out @sharkeducation , the nonprofit I started in 2012 with the goal of creating the next generation of shark advocates through education, outreach and adventure. In this photo I am showing a young student how to take a tissue sample during a scientific work up. This is part of our partnership with the Guy Harvey Research Institute to get kids on the water and participating in STEM science with sharks. This tissue sample ( like clipping your fingernails) can tell scientists about the sharks DNA, family tree and diet! If we want to protect sharks, we must know about them, their life history traits, their diet, their habitat use and migration paterns. Catching, tagging and releasing sharks can drastically increase our understanding, which leads to better management and conservation practices. Our goal is to give kids the opportunity to participate in real science, so are inspired to possibly pursue this as a career ( especially girls-women do this too) and to have understand what shark science involves and why we do it. #sharks #sharkweek #sharkscience #savesharks #sharkresearch #sharks4kids #sharkeducation #saveoursharks #likeagirl #sharkgirls #sharktagging #sharkconservation #ilovesharks

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List deepbluespirit2's Instagram Beautiful #blacktip #reefshark cruising thru the reef. Help protect sharks so that your kids have a chance to enjoy them as well. Filmed while freediving the Indian Ocean.
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#teamsharkwater #sharkangels #sharkconservation #savesharks #sharks #tiburones #requins #shark #nature #ocean #coral #reef #underwater #gopro #nikon #freediving #fish #peces #oceanramsey #tiburon 1567401017388180092_3265067530

Beautiful #blacktip #reefsharkcruising thru the reef. Help protect sharks so that your kids have a chance to enjoy them as well. Filmed while freediving the Indian Ocean. . . #teamsharkwater #sharkangels #sharkconservation #savesharks #sharks #tiburones #requins #shark #nature #ocean #coral #reef #underwater #gopro #nikon #freediving #fish #peces #oceanramsey #tiburon

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List aggie2832's Instagram In honor of shark week and the #seaphotocontest2017 let's throw it back to the first time I came nose-to-nose with these amazing animals on the world's most beautiful reefs #pipa #s268 #seasemester #savesharks #sharkconservation 1567395911779355102_240709874

In honor of shark week and the #seaphotocontest2017let's throw it back to the first time I came nose-to-nose with these amazing animals on the world's most beautiful reefs #pipa #s268 #seasemester #savesharks #sharkconservation

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List thenamelessbear's Instagram .
It's shark week.. Time to show our prominently-finned friends some love!
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A pelagic Thresher shark (Alopias pelagicus) glides gracefully, flaunting it's long tail which it uses as a whip to stun prey.
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Monad Shoal near Malapascua in the Philippines is known as a "cleaning station" where cleaner fish, like the small ones pictured, eat parasites and dead skin off the shark. Here, recreational divers can sight these apex predators daily!
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Show your love for sharks in the comments below! 👊🏼🐻 1567392694261801726_4150718931

. It's shark week.. Time to show our prominently-finned friends some love! . A pelagic Thresher shark (Alopias pelagicus) glides gracefully, flaunting it's long tail which it uses as a whip to stun prey. . Monad Shoal near Malapascua in the Philippines is known as a "cleaning station" where cleaner fish, like the small ones pictured, eat parasites and dead skin off the shark. Here, recreational divers can sight these apex predators daily! . Show your love for sharks in the comments below! 👊🏼🐻

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List marianto_v's Instagram So lucky to be able to live moments like this with these amazing animals 🦈 Here is a #funfact about #Sharks: they are actually worth more alive than dead! In addition to their value to ocean ecosystems, sharks can be an important economic asset. For countries and islands that rely on tourism, sharks are worth much more alive for activities such as diving, snorkeling, and shark watching, than for their fins and meat. The draw of divers to Malapascua Island in the Philippines to catch a glimpse of thresher sharks helped the island prosper again after the destruction from Typhoon Haiyan in 2013. Haiyan proved to be one of the strongest typhoons ever recorded. Malapascua is the only place in the world where thresher sharks can be seen almost every day. A study done in the Pacific nation of Palau estimated the value of sharks to the local economy at US$18 million per year, with the average individual reef shark representing a $1.9 million value over its lifetime. In stark contrast, the estimated value of the same shark sold for its meat and fins was just $108. (Credit: pewtrust.org) 
SAVE THE SHARKS!
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#sharkweek #tahiti #moorea #sharkconservation #sharklove #sharklover #lemonshark #lemonsharks #happy #padi #diver #dive #ocean #oceanlover #conservation #savetheocean  #tb #dmt #training #frenchpolynesia #economic #tourism #travel #explore #wanderlust #shark #savesharks 1567388217353958292_20231160

So lucky to be able to live moments like this with these amazing animals 🦈 Here is a #funfactabout #Sharks: they are actually worth more alive than dead! In addition to their value to ocean ecosystems, sharks can be an important economic asset. For countries and islands that rely on tourism, sharks are worth much more alive for activities such as diving, snorkeling, and shark watching, than for their fins and meat. The draw of divers to Malapascua Island in the Philippines to catch a glimpse of thresher sharks helped the island prosper again after the destruction from Typhoon Haiyan in 2013. Haiyan proved to be one of the strongest typhoons ever recorded. Malapascua is the only place in the world where thresher sharks can be seen almost every day. A study done in the Pacific nation of Palau estimated the value of sharks to the local economy at US$18 million per year, with the average individual reef shark representing a $1.9 million value over its lifetime. In stark contrast, the estimated value of the same shark sold for its meat and fins was just $108. (Credit: pewtrust.org) SAVE THE SHARKS! - - - - - - #sharkweek #tahiti #moorea #sharkconservation #sharklove #sharklover #lemonshark #lemonsharks #happy #padi #diver #dive #ocean #oceanlover #conservation #savetheocean #tb #dmt #training #frenchpolynesia #economic #tourism #travel #explore #wanderlust #shark #savesharks

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List finalliance's Instagram Now find us on Facebook!
facebook.com/finalliance121
#sharkadvocate #sharkconservation #savesharks #emptythetanks #stopsharkfinning #finsattached 
Photo credit Kimberly Jeffries 1567369413963150543_4841658475

Now find us on Facebook! facebook.com/finalliance121 #sharkadvocate #sharkconservation #savesharks #emptythetanks #stopsharkfinning #finsattached Photo credit Kimberly Jeffries

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List ___kim___x's Instagram Shark Week  on The Discovery Channel.  #dancewithsharks #sharkweek #nofear #ocean #sharkconservation #protectoceanlife 1567343487409249609_2224858225

Shark Week on The Discovery Channel. #dancewithsharks #sharkweek #nofear #ocean #sharkconservation #protectoceanlife

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List seaslack's Instagram Wow!! 😱 1567319541725016382_5542929612

Wow!! 😱

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List projectaware's Instagram "Sharks are indicators of ocean health, playing a key role in maintaining healthy seas" 📷#repost @sharksneedlove - Become a shark #Finbassador this #SharkWeek 1567290687950936554_614938652

"Sharks are indicators of ocean health, playing a key role in maintaining healthy seas" 📷 #repost@sharksneedlove - Become a shark #finbassadorthis #sharkweek

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List oneoceandiving's Instagram (PART 2 of 2)
The largest impact on our understanding of visual capabilities in sharks came with the eventual finding that practically all sharks have duplex retinas containing both rod and cone photoreceptors (Gruber and Cohen, 1978). With some shark species it is easy to distinguish the colour and detail of their eyes but with the White shark it is a bit more difficult. The ‘black eye’ reputation is aided by the fact that the cornea is mostly black and the iris is dark blue (Thomas 2016). When the sun catches the eye the blue becomes more evident, the sphere is highlighted and different sections of the eye become more distinct. Perceptions are changing. Anyone who has had the honour to observe a White shark at close quarters can attest to the fact that the shark does not have blank, staring eyes, but inquisitive eyes that closely inspects those who inspect them and they watch with the same level of caution and curiosity. 
Post by @oceans_grace
Photo credit: @oceanramsey 
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Want to learn more about sharks or adoption visit our website:  OneOceanDiving.com & JOIN US in the water  in #Hawaii on #Oahu’s #NorthShore to #SwimWithSharks and #DiveWithSharksInHawaii with a @OneOceanDiving trained #MarineBiologist / #SharkSafetyDiver Check out our #Shark and #MarineResearch @OneOceanResearch and our outreach program @OneOceanEducation #LearnAboutSharks and our Non-Profit @WaterInspired conservation group and Founders: @Juansharks and @oceanramsey 
Want to join the team? Become a @OneOceanGlobal Ambassador 
Looking to support in other ways? Check out our not-for-profit marine conservation awareness apparel and gifts @OneOceanDesigns or at www.HawaiiSharkDiver.Com Mahalo and Thank you for Supporting
#InternationalSharkProject #HawaiiSharkCount #SharkResearch #Ocean #OneOcean #SaveTheOcean #SaveSharks #HelpSaveSharks #OceanConservation #SharkConservation
#ApexPredatorNotMonster 1567259548765814548_1208853862

(PART 2 of 2) The largest impact on our understanding of visual capabilities in sharks came with the eventual finding that practically all sharks have duplex retinas containing both rod and cone photoreceptors (Gruber and Cohen, 1978). With some shark species it is easy to distinguish the colour and detail of their eyes but with the White shark it is a bit more difficult. The ‘black eye’ reputation is aided by the fact that the cornea is mostly black and the iris is dark blue (Thomas 2016). When the sun catches the eye the blue becomes more evident, the sphere is highlighted and different sections of the eye become more distinct. Perceptions are changing. Anyone who has had the honour to observe a White shark at close quarters can attest to the fact that the shark does not have blank, staring eyes, but inquisitive eyes that closely inspects those who inspect them and they watch with the same level of caution and curiosity. Post by @oceans_grace Photo credit: @oceanramsey _____________ Want to learn more about sharks or adoption visit our website: OneOceanDiving.com & JOIN US in the water in #hawaiion #Oahu’s #northshoreto #swimwithsharksand #divewithsharksinhawaiiwith a @OneOceanDiving trained #marinebiologist/ #sharksafetydiverCheck out our #sharkand #marineresearch@OneOceanResearch and our outreach program @OneOceanEducation #learnaboutsharksand our Non-Profit @WaterInspired conservation group and Founders: @Juansharks and @oceanramsey Want to join the team? Become a @OneOceanGlobal Ambassador Looking to support in other ways? Check out our not-for-profit marine conservation awareness apparel and gifts @OneOceanDesigns or at www.HawaiiSharkDiver.Com Mahalo and Thank you for Supporting #internationalsharkproject #hawaiisharkcount #sharkresearch #ocean #oneocean #savetheocean #savesharks #helpsavesharks #oceanconservation #SharkConservation #apexpredatornotmonster

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List oneoceandiving's Instagram (PART 1 of 2) It's a common misconception that White sharks have lifeless black eyes. Take a closer look by zooming in on this picture and you can see that they actually have a beautiful blue iris! They  have an almost identical eye structure to humans although theirs is especially adapted to life under water. It is made up of a lens, iris, cornea, retina, choroid and sclera. The outer layer of the shark eye comprises a thick cartilaginous sclera and a gently curving, transparent cornea, which includes fibers that resist corneal swelling and loss of transparency in challenging chemical environments (Tolpin et al. 1969). Most sharks, including the White shark, have a dynamic iris that can increase and decrease the size of the pupil depending on the level of light. This is a function that other bony fish (teleosts) are not capable of (Meyer 2013). At the back of the eye behind the retina and in front of the sclera lies the choroid, the only vascularised tissue within the adult shark eye. The choroid in nearly all sharks contains a specialised reflective layer known as the tapetum lucidum which makes it particularly adept at seeing underwater. This specialised reflective layer consists of a series of parallel, platelike cells containing guanine crystals (Gilbert, 1963). The function of the tapetum lucidium is to reflect back photons that have passed through the retina and have not been absorbed by the photoreceptive layer. This allows a second chance for the detection of photons and therefore increases the sensitivity of the eye in low light. (Continued in part 2)
Post by @oceans_grace
Photo by @oceanramsey 
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Want to learn more about sharks or adoption visit our website:  OneOceanDiving.com & JOIN US in the water  in #Hawaii on #Oahu’s #NorthShore to #SwimWithSharks and #DiveWithSharksInHawaii with a @OneOceanDiving trained #MarineBiologist / #SharkSafetyDiver Check out our #Shark and #MarineResearch @OneOceanResearch and our outreach program @OneOceanEducation #LearnAboutSharks and our Non-Profit @WaterInspired conservation group and Founders: @Juansharks and @oceanramsey 
Want to join the team? Become a @OneOceanGlobal Ambassador 1567258939459238370_1208853862

(PART 1 of 2) It's a common misconception that White sharks have lifeless black eyes. Take a closer look by zooming in on this picture and you can see that they actually have a beautiful blue iris! They have an almost identical eye structure to humans although theirs is especially adapted to life under water. It is made up of a lens, iris, cornea, retina, choroid and sclera. The outer layer of the shark eye comprises a thick cartilaginous sclera and a gently curving, transparent cornea, which includes fibers that resist corneal swelling and loss of transparency in challenging chemical environments (Tolpin et al. 1969). Most sharks, including the White shark, have a dynamic iris that can increase and decrease the size of the pupil depending on the level of light. This is a function that other bony fish (teleosts) are not capable of (Meyer 2013). At the back of the eye behind the retina and in front of the sclera lies the choroid, the only vascularised tissue within the adult shark eye. The choroid in nearly all sharks contains a specialised reflective layer known as the tapetum lucidum which makes it particularly adept at seeing underwater. This specialised reflective layer consists of a series of parallel, platelike cells containing guanine crystals (Gilbert, 1963). The function of the tapetum lucidium is to reflect back photons that have passed through the retina and have not been absorbed by the photoreceptive layer. This allows a second chance for the detection of photons and therefore increases the sensitivity of the eye in low light. (Continued in part 2) Post by @oceans_grace Photo by @oceanramsey _____________ Want to learn more about sharks or adoption visit our website: OneOceanDiving.com & JOIN US in the water in #hawaiion #Oahu’s #northshoreto #swimwithsharksand #divewithsharksinhawaiiwith a @OneOceanDiving trained #marinebiologist/ #sharksafetydiverCheck out our #sharkand #marineresearch@OneOceanResearch and our outreach program @OneOceanEducation #learnaboutsharksand our Non-Profit @WaterInspired conservation group and Founders: @Juansharks and @oceanramsey Want to join the team? Become a @OneOceanGlobal Ambassador

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