Roboastra tigris
Farmer, 1978

Suborder: DORIDINA
Family: Polyceridae
Subfamily: Nembrothinae


Gulf of California


UPPER: Adult about to eat a specimen of Tambja abdere. LOWER: Juvenile. Both animals were collected in Bahia de Los Angeles, Baja California, 2000. PHOTOS: Angel Valdes.

It can grow to 12 inches (30 cm) in length and feeds on other nudibranchs which it grasps with its radular teeth and swallows whole. It is reported to feed on the bryozoan-feeding nudibranchs Tambja eliora and Tambja abdere and is also cannibalistic, eating others of its own kind.

•Farmer, W.M. 1978. Tambja and Roboastra (Mollusca, Opisthobranchia) from the Gulf of California and the Galapagos Islands. The Veliger, 20: 375-385.

Authorship details
Rudman, W.B., 2000 (December 28) Roboastra tigris Farmer, 1978. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

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