Does anyone know the identity of this blue crab species? Spotted living on a big barrel sponge at Alor, Indonesia. Also any info on what the brittlestar (I think?) also seen in the picture might be.
In addition, any thoughts on what the crab is eating? It seems to have gathered some yellowish 'stuff', more of which is visable on the rest of the sponge. Maybe only ramdom plankton, or something excreted / secreted / digested from the sponge by the brittlestar? I'm just curious really!