Ocelli or eye spots Simple eye in invertebrates

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some jellyfish, sea stars, , flatworms bear simplest eyes, pigment spot ocelli, have pigment distributed randomly , have no additional structures such cornea , lens. apparent eye color in these animals therefore red or black. however, other cnidaria have more complex eyes, including of cubomedusae have distinct retina, lens, , cornea.


many snails , slugs (gastropod mollusks) have ocelli, either @ tips or @ bases of tentacles. however, other gastropods, such strombidae, have more sophisticated eyes. giant clams (tridacna) have ocelli allow light penetrate mantles.








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