my bi color blenny was like that too. they like their rock, and dont want others around it, but will eventually lighten up. i would put a tail spot in, he tries to find a place to call home, but the bi color says "nope, seats taken" until he finds a spot where the bi color cant see him. he would find him, and chase him out, but eventually give up on itYeah will be keeping look out thanks.hopefully just squabbles and nothing to serious.the 2 young clowns and silver belly wrasse and ywg no problem,just the bloody older blennie,like the whole tank is his lol,hopefully the blennies can work it out and have 1 rock structure each as they quite big at 40 cm high by 45 cm wide by 30 deep but we shall see.i think luckily i got the large gsp frag also and blennie found refuge in that and doesnt belong to older blennie so he's allowing it kind of thing

