sentence: Sea urchins are one of the favorite foods of sea otters and is also wolf eels.
sentences_before: Sea urchins feed mainly on algae, but can also feed on sea cucumbers, and a wide range of invertebrates such as mussels, polychaetes, sponges, brittle stars and crinoids. Baumiller T.K. 2008.
sentences_after: Left unchecked, urchins may devastate their environment, creating an 'urchin barren', devoid of macroalgae and associated fauna. Sea otters have re-entered British Columbia, dramatically improving coastal ecosystem health by eating sea urchins.
concept_name: sea urchin
headings: Sea urchin Ecology
categories: Echinoderms