Nembrotha chamberlaini  Gosliner & Behrens, 1997

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The patch around the base of the gills and rhinophores of Nembrotha chamberlaini - the same colour as the rhinophores and gills - vary from bright red to dark brownish black. It feeds on ascidians.
More information on Nembrotha chamberlaini are on Bill Rudman's Sea-Slug Forum!