This small species measures about 6-7mm in length. The first one, in the first three photos below, was on algae on the Kwajalein Atoll lagoon slope at a depth of about 30m on 9 March 2009. It bears some resemblance to Elysia arena, but seemed different enough to keep it separate for now.
Three more specimens were found on 27 and 28 May 2012 in loose fine algae debris at the base of the lagoon slope at 33m. One of these is figured below.
Created 11 March 2009
Updated 11 October 2012
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