Ilbia mariana is a tiny animal, only about 2mm long. Long known in the Marshalls from only a couple of specimens, a cluster of them was found on 1 June 2016 in algae at a depth of about 5m on the top of the Kwajalein Atoll seaward reef flat. One of these is figured below. One of the earlier specimens was found only on film, after a close examination of a photograph of Goniobranchus sp. e006.
Created 28 January 2007
Updated 16 July 2016