Most observed native irregular sea urchins
Native to the US, by how plants support them, most observed first.
Other species All
15 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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Common Sand Dollar
Echinarachnius parma
1,986 observations
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Isometric Sand Dollar
Mellita isometra
1,112 observations
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Keyhole Sand Dollar
Mellita tenuis
602 observations
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Groove Burrowing Urchin
Brissus unicolor
565 observations
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Fat Sea Biscuit
Clypeaster rosaceus
442 observations
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Six-keyhole Sand Dollar
Leodia sexiesperforata
244 observations