I would say "MAYBE" my pacus has been like angles to other fishes but my first jar got his head riped of buy the pacu, but he was 3x as big tho but never bother other fish so i thought it was ok. My 2nd jar that was almost the same size as th epacu died after 1 day in the pacu tank, but i eraly dont know why he died. I thik he got scared and jumped and knocked him self out since there was no marks on the jar. So ill say it might work but my pacus doesnt like aros thats for sure. Other fishes are no problem for them. Only lost 2 fishes in that tank and both been jars