Micromelo undatum is known in the Marshalls from just a few specimens. They inhabit lagoon sandy areas at depths of 5 to 15 meters. Micromelo undatum was originally described from the Caribbean, and the Pacific variety was given a different name, Micromelo guamensis. Now many opisthobranch researchers think it is probably just one circumtropical species. Specimens we have seen in Hawaii have some slight color differences.
Created 22 January 2007
Updated 27 April 2009