I had one and it died within a week. He did pester the other fish and wouldn't eat anything I put in the tank even though he would chase it.
Yes I did. But they all got along great. He tried to find slime and parasites on my huge chromis. They didn't mind. No one chased him. He just wouldn't eat anything. Didn't matter what I offered. Mysis, brine, pellets, flakes. Nothing. He just wasted away.
I’ve had two BIOTA cleaner wrasse. Both started great but had issues as they got older. They both became very aggressive to specific fish. Attacking them to the point where I had to remove one and even killing a fish.
Wild ones often pester fish and in some cases pester aggressively especially when hungry. Captive bred are less likely to do that because they aren’t usually hungry. Where the aggression towards specific fish comes from I don’t know. My only theory is they mistake natural dots for parasites.
I’ve not got my own cleaner anymore (my last one harassed pencil wrasse to the point of death), but I’ve brought in captive cleaners to the LFS and well, we only put them with big fish now for that same reason of they harass so many smaller fish.
I’ve found cleaners to be highly territorial wrasses, I would probably assume the aggression comes from the other fish looking like a threat to their food source (parasites, dead scales, old slime coats etc.).
