subclass
Sea Urchins
Euechinoidea
Field notes
Children
Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Most observed native sea urchins All
Native to the US, by observations.
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Pacific Purple Sea Urchin
Strongylocentrotus purpuratus
20,153 observations
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Eccentric Sand Dollar
Dendraster excentricus
11,832 observations
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Indo-Pacific Rock-boring Urchin
Echinometra mathaei
6,637 observations
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Red Sea Urchin
Mesocentrotus franciscanus
5,677 observations
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Collector Urchin
Tripneustes gratilla
3,914 observations
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Atlantic Long-spined Sea Urchin
Diadema antillarum
3,304 observations
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Red Pencil Urchin
Heterocentrotus mamillatus
2,767 observations
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Shingle Urchin
Colobocentrotus atratus
2,339 observations
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Blue-black Urchin
Echinothrix diadema
1,003 observations
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Black Starry Sea Urchin
Arbacia stellata
516 observations
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Crowned Sea Urchin
Centrostephanus coronatus
423 observations
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White Sea Urchin
Lytechinus pictus
294 observations
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Heart Urchin
Lovenia cordiformis
76 observations
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Indo-Pacific Long-spined Urchin
Diadema paucispinum
51 observations
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Warty Sand Urchin
Nudechinus verruculatus
36 observations