Asked in Freshwater Fish
Is the shark the only fish that can blink with both eyes?
Even though sharks are among very few fish which have eyelids, they do not blink. Most species of sharks have special nictitating membranes which go over their eyes to protect them when they are hunting or under attack. ...
Do betta fish blink?
No, no fish can blink because they have no eyelids. We blink to regain moisture in our eyes and wash away dirt, but they are surrounded by moisture and water, so there is no need to blink. However, the are a few that have a nictitating membrane (also called the third eyelid) that they "blink". This "third eyelid" is used to protect the eyes. ...