A relative of starfish does not have eyes, but can still see. That information comes from scientists who studied sea creatures in the coral reefs of the Caribbean and Gulf of Mexico. The researchers reported this month that the starfish relative, called the red brittle star, is only the second creature known to be able to see without having eyes. This ability is called extraocular vision. The other creature said to have extraocular vision is a kind of sea urchin. Brittle stars, with five arms extending from a central disk, are part of a group of marine life called echinoderms. They have a nervous system but no brain.