29K views · 3.4K reactions | Did you catch the third eyelid?  The...

56K views · 572 reactions | The viral video shows incredible eye blinking moment which is entirely different from the way humans blink. The moment was captured by Gavin Free in slow motion and shared IFS officer Parveen Kaswan. | The Times of India | Facebook

1.7K views · 48 reactions | The Nictitating Membrane is a thin, translucent layer located beneath the regular eyelids of many bird species. This membrane serves functions like eye protection and moisture retention. Watch it here. | Animals Videos | Facebook

Some species have whats called a nictitating membrane which is an inner eyelid that protects their eyes. Just as we would shut our eyes instinctually if something came close to it, they do the same. It doesnt mean they are about to attack as you can see here in this video, I didnt even need to redirect this shark. 💙🦈 First clip by Hawaii Adventure Diving #tigershark #savesharks #sharkdiver #sharkdiving #ocean | Kayleigh Nicole Grant

38K views · 414 reactions | Some shark species have an inner eyelid called the nictitating membrane used for protecting their eye. The myth is that it means they are going to attack but as you can see here its just for protection as this shark rams into boat. 麗 : @mermaid.kayleigh #sharks #sharklover #sharklife #sharkconservation #tigershark #ocean #sea #sharkdiver #sharkdiving #underwaterworld #wildlife #nature #ocean | Shark Lovers | Facebook