A class of the echinoderms, having a typically globular of flattened body with skeletal plates to form a rigid test.
The following taxa of this class occur in the region:
Diadema antillarum (Long-spined urchin)
Echinometra lucunter (Rock-boring urchin)
Echinometra viridis (Green rock-boring urchin)
Lytechinus variegatus (Variegated urchin)
Lytechinus williamsi (Jewel urchin)
Eucidaris tribuloides (Mine urchin)
Tripneustes ventricosus (Sea egg)
Meoma ventricosa (Red heart urchin)
Clypeaster subdepressus (Sand dollar)
Mellita sexiesperforata (Key hole urchin)