Elysia rufescens is known from the Marshalls from only two specimens so far, both in very shallow water. The first was under a rock on a Kwajalein Atoll intertidal reef at low tide on 21 July 2009. It measured about 25mm in length. We have also seen this species in Hawaii and at Nauru Island.
The second specimen was a bit more green and less red, and was found on 28 March 2011 under a rock with eggs at the northeast lagoon tip of Kwajalein Island, right along a man-made riprap that guards against island erosion. Water depth at middle low tide was about a half meter.
Created 26 July 2009
Updated 7 April 2011