Look out, urchin on the move! Long-spined sea urchins (Diadema antillarum) help control algae populations in on coral reefs, ensuring coral larvae have a clean, hard surface on which to settle on. These urchins have been subject to die-offs, and researchers in the Caribbean and the Netherlands are hard at work developing ways to help the species recover. | Vancouver Aquarium

Have you ever seen a sea urchin walk? This guy was out cruising his territory on a recent night dive. 😮 Fun fact: They have no eyes yet they see! Find out more below. According to recent research “Sea urchins are currently the only animals that have been shown to see without having eyes. They see using light-sensitive cells in their tube feet, which resemble tentacles and, like the spines, are all over the body. You could say that the entire sea urchin is one single compound eye.” #urchin #scub