Brittle StarsOphiuroidea ssp.
There are some 1,500 known species of Brittle Star living today. Brittle Stars have existed for some 500 million years and live in all ocean environments, from the Poles to the Tropics and from the deepest parts of the ocean (6000m) to our shallow reef environment. Some deeper dwelling species have arms that reach twenty-four inches in length. They hide under rocks during the day and scavenge in the open at night, feeding on decomposing plant and animal parts. They have no eyes, but sensory nerve endings that can sense temperature, touch and even light.
Here they will be categorized as Short Spine, Blunt Spine, or Long Spine.