Uploaded March 2024 | Updated September 2026, 1 week ago

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Animals that never close their eyes
fishes
Fish (some species): Many fish do not have eyelids, so their eyes are always open. However, some species
have a nictitating
membrane, a transparent
Sharks: Sharks do not have true eyelids, and their eyes are always open. They have a specialized membrane that cOvers their eyes during hunting or when
Snakes: Snakes don't have eyelids, but they have a transparent scale, called a spectacle, Over each eye, providing some protection.
Geckos: Some species of geckos lack eyelids and instead have a
transparent membrane Covering their eyes.
Turtles: Turtles have a protective nictitating
membrane that covers their eyes, but it doesn't function like
typical eyelids.
Стосоаіеs: СrосоаПеs hnауеаprotective membrane that cOvers their eyes, especially when submerged, but it's not a
true eyelid.
Birds of prey (e.g.,.eagles): Some birds of prey, like eagles, have a third eyelid called a nictitating membrane, which helps protect their eyes during flight and
hunting.
Isects: Insects typically don't have eyelids. Instead, they may have compound eyes or simple eyes that are always exposed