Polycera atra, common name orange-spike polycera or sorcerer's sea slug, is a species of sea slug, a nudibranch, a marine gastropod mollusk in the family Polyceridae.
Distribution This species of polycerid nudibranch was described from California.MacFarland, F. M., 1966. Studies of opisthobranchiate mollusks of the Pacific coast of North America. Memoirs of the California Academy of Sciences, 6: 1-546, pls. 1-72.
Description The body of Polycera atra is translucent white with longitudinal black lines interspersed with rows of raised yellow spots. The oral veil has 4-8 tapering yellow-tipped papillae.Rudman, W.B., 2000 (July 4) Polycera atra MacFarland, 1905. [In] Sea Slug Forum. Australian Museum, Sydney.
Ecology Polycera atra feeds on the bryozoan Bugula.
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