Two of these measuring 5 and 12mm were found by Christina Sylvester on a floating rope marking a swimming area on the lagoon side of Kwajalein's northeast end. It is possible they are a speckled form of Metaruncina sestoensis, which according to Gosliner et al (2018), has been found in the Marshall Islands.
Created 21 August 2016
Updated 2 December 2018