2.4K views · 77 reactions | Alligators have a third eyelid called a nictitating membrane. These membranes act as goggles for the alligator and protect their eyes while underwater. You can see this juvenile American alligator blinking its third eyelid in this video. | NC Aquarium at Pine Knoll Shores | Facebook

Did you know crocodiles have a third eyelid? 👀 It’s called a nictitating membrane, and it helps protect their eyes while allowing them to see underwater. #Crocodile #WildlifePhotography #Reptiles #Predator #NatureFacts #WildlifeMoments #AnimalBehavior | Juan Álvarez

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. 🦈💙 🎥: @mermaid.kayleigh #sharks #sharklover #sharklife #sharkconservation #tigershark #ocean #sea #sharkdiver #sharkdiving #underwaterworld #wildlife #nature #ocean | Shark Lovers