Ilbia mariana is a tiny animal, only about 2mm long. Long known 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 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