The sleeper torpedo (Crassinarke dormitor) is a species of electric ray in the family Narkidae. It is the only species in its genus. It occurs in relatively shallow water off the coasts of southern Japan, China and Taiwan. It may be the same species as the Japanese sleeper ray (Narke japonica)
- Froese, Rainer and Pauly, Daniel, eds. (2011). "Crassinarke dormitor" in FishBase. June 2011 version.
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