When sea otters became extremely rare on the California coast, their usual prey (sea urchins) became overabundant and consumed most of the kelp that was the principal habitat for a diversity of fishes and invertebrates. Which statement best describes this situation?

+3 votes



Sea otters are keystone species.


Sea urchins are keystone species.


This is an example of mutualism between sea urchins and sea otters.


Sea urchins are parasitic on kelp.


asked Jan 3, 2013 in Biology by anonymous

1 Answer

+1 vote


Sea otters are keystone species.


answered Jan 3, 2013 by FLoops ~Expert~ (2,117 points)

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