I've seen a lot of mixed reports on C. aquamarinus (solorensis). @i cant think has one. I think @luis angel has one, and I've seen others with this wrasse that haven't had issues with aggression. That said, each individual fish might be more or less peaceful. I even heard of one person's C. isosceles (typically shy, peaceful) being a super wrassehole. I would probably avoid mixing with others in the cyanopleura complex, and I might not even mix an Exquisite with the aquamarinus (obviously stay way away from Scottorum complex).So according to the graph you sent me a few weeks ago, that'd be a moderately aggressive wrasse? Never had wrasse before but I assume, like most fish, start with the peaceful first?