Finally, evidence that a starfish’s eyes let it see

By Sarah Zielinski, 08:52 AM January 9, 2014

If you’ve ever picked up a starfish — or sea star, as they’re more properly called — you probably didn’t notice the eyes. At the tip of each arm sits a tiny compound eye composed of ommatidia, which are clusters of photoreceptor cells. Though the existence of the eyes has been known for about 200 years, scientists weren’t sure whether sea stars could actually see with them.

But now a slightly gruesome experiment has shown that, yes, starfish can see, though not particularly well. Anders Garm o...

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