How to Distinguish from Similar Species: S. droebachiensis is similar size and only a slightly darker green hue. However, S. droebachiensis has tube feet darker than the spines, and usually purple. The spines of S. droebachiensis have ridges with rounded surfaces and with periodic, somewhat fan-shaped sculpturings.
Geographical Range: (Occurs at least here and in Norway, off Russia from the Barents Sea down to the central part of the Sea of Japan). Probably pan-Arctic. This and S. droebachiensis are the only species of urchin in the Puget Sound area that are also found in the NW Pacific off Russia (Bazhin, 1998).
Depth Range: Strictly subtidal, and usually deeper than 30 m
Habitat: Known to occur on both sandy/shell hash bottoms and in rocky areas.
Biology/Natural History: Deep-living. May harbor the intestinal rhabdocoel flatworm Syndisyrinx (=Syndesmis) franciscanus. We find this species on sandy/shell hash bottoms in the San Juan Channel at about 100-120 m depth.
Kozloff 1987, 1996
McEdward, Larry R. and Benjamin G. Miner, 2006. Estimation and interpretation of egg provisioning in marine invertebrates. Integrative and Comparative Biology 46:3 pp 224-232
Vilela-Silva AC, Castro MO, Valente AP, Biermann CH, Mourao
Sulfated fucans from the egg jellies of the closely related sea urchins
Strongylocentrotus droebachiensis and Strongylocentrotus pallidus
species-specific fertilization. J Biol Chem. 2002 Jan
General Notes and Observations: Locations, abundances, unusual behaviors:
Authors and Editors of Page:
Dave Cowles (2005): Created original page