Most observed native sea urchins
Native to the US, by how plants support them, most observed first.
Plant eaters All
12 native animals that feed on plants, most observed first.
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Pacific Purple Sea Urchin
Strongylocentrotus purpuratus
20,153 observations
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Arctic Green Sea Urchin
Strongylocentrotus droebachiensis
9,073 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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Atlantic Rock-boring Urchin
Echinometra lucunter
4,246 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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Variegated Sea Urchin
Lytechinus variegatus
2,811 observations
Other species All
25 native species with no plant ties on record, most observed first.
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Eccentric Sand Dollar
Dendraster excentricus
11,832 observations
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Five-slotted Sand Dollar
Mellita quinquiesperforata
3,546 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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Common Sand Dollar
Echinarachnius parma
1,986 observations
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Purple-brown Urchin
Arbacia punctulata
1,514 observations
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Isometric Sand Dollar
Mellita isometra
1,112 observations
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Blue-black Urchin
Echinothrix diadema
1,003 observations