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Long-Spined Sea Urchin (Diadema antillarum): extremely long, thin, dark spines. |
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Rock-Boring Urchin (Echinometra lacunter): test reddish in color, spines numerous, short, and thick. |
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Slate-Pencil Urchin (Eucidaris tribuloides): spines very thick with blunt tips. |
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West Indian Sea Egg (Tripneustes ventricosus): short, thin white spines with dark test. Generally cover themselves with sea grass or other detritis. |