More Echinoderms

A tiny larval (baby) starfish. The immature forms of invertebrates and other animals may be even more vulnerable to threats such as oil spills than adult forms.
Thousands of seamounts—most of them undersea volcanoes—tower above the muddy seafloor. They provide something hard to come by in the deep ocean: a solid surface to cling to. Corals, sponges, and...
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