hi i have 6 uarus and everything i looked at said they were peaceful fish but 3 of them are 7/8 inch and 3 are around 5/6 inch and the 1 big one keeps bullying the other big 1 and its just constant hes all marked and everything what can i do?
They are peaceful as far as large cichlids go, but can be quite aggressive towards each other when older and/or when breeding. Can you see the large aggressor pairing up with one of the others?