convicts are not known to live in community tanks if so there must be tons of tons for them so that they dont set up a territory at all, i must say is the convict or zebra cichlid, they arent known to be peaceful mine has KILLED not injure 3-4 tiger barbs, and those guys are hella fast and kill/or severely injure in just days smaller cichlids in its 20 gallon tank, and in breeding they do bite owners where it can bleed a bit and with fishes an eye is probably nothing with a breeding pair, my male wins against my jewel cichlid which are same size and jewels r known to be always winners no matter wat size