Appearance
''Goniobranchus geometricus'' is a small nudibranch which may grow to a total length of 35mm. It is variably coloured, with the ground colour ranging from a creamy brown to purple, The mantle has numerous cream-coloured bumps and has a white margin. The gills and rhinophores are white to greenish. It is very similar to ''Goniobranchus conchyliatus'' but has green-grey rhinophores and gills whilst ''G. conchyliatus'' has red ones.
Distribution
This species is found throughout the Indian Ocean as well as the Western Pacific Ocean from the intertidal down to 30m.Rudman, W.B., 1999 [In] Sea Slug Forum. Australian Museum, Sydney.
Habitat
This animal feeds on the sponge ''Chelonaplysilla violacea.References:
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