Aesthete (chiton)
Encyclopedia
Aesthetes are visual organs in chiton
Chiton
Chitons are small to large, primitive marine molluscs in the class Polyplacophora.There are 900 to 1,000 extant species of chitons in the class, which was formerly known as Amphineura....

s. They are tiny 'eyes', too small to be seen unaided, embedded in the organism's shell. They may act in unison to function as a large, dispersed, compound eye. They are light sensing organs that are derived from the mantle of the organism.

Some chitons also have larger lens-bearing eyes.
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