| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Strongylocentrotus droebachiensis (Müller, 1776) |
Northern sea urchin | Northern Pacific, Northern Atlantic and the Arctic | 10 |
| Strongylocentrotus fragilis Jackson, 1912 |
Orange-pink sea urchin | Northeast Pacific | |
| Strongylocentrotus pallidus (Sars, 1871) |
Pale urchin | Arctic, Northern Pacific and Northern Atlantic | |
| Strongylocentrotus purpuratus (Stimpson, 1857) |
purple urchin | Eastern Pacific | 8.5 |