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Explore Alt Text, Iris Eyes, and more!

Here’s an eye that looks pretty alien compared to our own. It belongs to the blue crayfish, which, as an arthropod, has compound eyes – as you can see if you look closely. Compound eyes are made up of a cluster of tiny tubes called ommatidia. Located at the top of little stalks, a crayfish's eyes are able to swivel around and keep a good watch out for predators. And, of course, prey...