Fish with eyelids

  • We are currently upgrading MFK. thanks! -neo
Some fish, as with some amphibians, have the ability to thrust their eyes down into their eye sockets to aid in pushing food down their throats. Sharks have a protective membrane which covers the eye at the moment of striking to reduce damage risks to their eyes. Some benthic fish have adipose eyelids. Their function is not completely understood. The most popular theory is that since bentic fish live in perpetual darkness, the translucent eyelids may be employed as light wavelength filters to help the wide pupils make sense of their surroundings when they venture up the water column towards lighted areas.
 
Nice find. Looked it up and it seems that puffers of the genus Arothron share the ability of being able to blink. Presumably evolved as a defense againt damage from crustaceans that make up the bulk of their diet.
 
As someone who has kept a panda puffer I can tell you that all the "dog faced" family of puffers do this. they even close their eyes when they sleep at night and curl up into a little ball.
 
My big fahaka and Mbu can "suck" their eyes back into the socket like Phil mentioned, but as far as I know only a few SW puffers can blink.
 
MonsterFishKeepers.com