Calkins, DG. 1978. Feeding behavior and major prey species of the sea otter, Enhydra lutris in Montague Strait, Prince William Sound, Alaska. Fish Bulletin. 76(1): 125-131.

Christensen, A M. 1957. The feeding behavior of the seastar Evasterias troschelii. Limnology and Oceanography 2(3): 180-197.

O’Clair RM, O’Clair CE. 1998. Southeast Alaska’s rocky shores: Animals. Auke Bay: Plant Press. pp. 294-295.

Ruppert E E, Barnes R D. 1996. Invertebrate Zoology, 6th ed. Fort Worth: Saunders College.