Long Spined Urchin © Shedd Aquarium
Long Spined Urchin (Diadema antillarum):
The Long Spined Urchin or "regular" urchin, as it is referred to,
is a fair sized echinoderm residing in the Bahamas and Atlantic Ocean. It is
usually black, although, it can sometimes be white. Adults can be up to 50 cm
in length and have painful spines. These spines are used as defense against
predators. They live on hard and soft surfaces over the ocean bottom usually
in shallow water. They have slow movements and eat algae.
- Farland, K.C. and J.B. Woods. "Marine Invertebrates of Bermuda: Long-spined sea urchin (Diadema antillarum)."
- http://www.thecephalopodpage.org/MarineInvertebrateZoology/Diademaantillarum.html
