I am contemplating another addition for my small tank, to add some blue colour. Currently there are two Percula Clowns in it, and two tiny common gobies (silver greyish colour). I thought maybe a yellow-tailed blue damselfish, but I read they can be aggressive. The other fish I am looking at is a blue Assessor - assessor macneilli. Some sites say these are semi aggressive, and I don't know much about them.
Would the Blue Assessor live well with the Clowns?
Would the Blue Assessor live well with the Clowns?