We saw these on two occasions in 2015, a pair and a single, with the pair obviously feeding on a light gray sponge.
In May, 2016, we saw specimens at Arthur's, Minilog and Kitchen Rock.
Several more were seen in 2017 and 2018 at Apol's and Sepoc.
The tiny one below appears to be a juvenile. It was on the wall at Ligpo in 2017.
Created 13 June 2015
Updated 9 December 2018