This unidentified species was long known from the single individual pictured below. It measured 7mm in length and was found on 17 November 1981 on the pilings of Medren Island pier at Enewetak Atoll at a depth of 1 meter. This particular animal is the one figured by Gosliner et al (2018) as Tenellia sp. 30.
More recently (June 2018), Stan Jazwinski found the individual below on hydroids under a rock at 6m on Kwajalein Atoll's seaward reef. This specimen and Stan's suggestion made me realize that this is likely the same as what we are calling Eubranchus sp. e315.
Another photo by Jay Lord of the recent specimen.
Created 8 January 2007
Updated 4 December 2018