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A phylum of marine coelomate animals that are bilaterally symmetrical as larvae but show five-rayed symmetry as adults and have a calcareous endoskeleton and a water vascular system.

The following taxa of this phylum occur in the region:

Class Asteroidea (Sea stars)
Class Crinoidea (Feather stars)
Class Echinoidea (Sea urchins)
Class Holothuroidea (Sea cucumbers)
Class Ophiuroidea (Brittle stars)
Nemaster grandis (Black and white crinoid)
Analcidometra armata (Swimming crinoid)
Astichopus multifidus (Furry sea cucumber)
Isostichopus badionotus (Three-rowed sea cucumber)
Holothuria mexicana (Donkey dung sea cucumber)
Holothuria thomasi (Tiger tail sea cucumber)
Euapta lappa (Beaded sea cucumber)
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)
Ophiothrix suensonii (Suenson's brittle star)
Ophionereis reticulata (Reticulated brittle star)
Ophiocoma echinata (Spiny ophiocoma)
Ophioderma appressum (Banded-arm brittle star)
Ophioderma rubicundum (Ruby brittle star)
Astrophyton muricatum (Great basket star)
Oreaster reticulatus (Cushion sea star)
Davidaster rubiginosa (Golden crinoid)
Davidaster discoidea (Beaded crinoid)

Echinoderms (Phylum Echinodermata)