CATDOLL : CATDOLL: Do sea urchins have eyes?

Do sea urchins have eyes?

Sea urchins have many sensory cells on their spines, forked spines and tube feet to detect external information, including food sources, light intensity, current strength, water quality, etc. The tube feet at the mouth of the sea urchin, the tube feet all over the heart-shaped sea urchin and the tube feet on the mouth of the sand dollar are all important sensory organs. Although sea urchins do not have eyes, they have eye spots and photoreceptor cells in the epidermal cells on the anti-oral surface, which are very sensitive to light.

Do starfish have eyes?

Starfish do not have specialized eyes. There is a red eye spot at the end of each arm, which may be an important area for sensing light. Most starfish are negatively phototropic and do not like light, so they are mostly active at night. Although starfish do not have eyes, they have many chemical receptors on their bodies that can detect food sources in the water and quickly find food.

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