I'm saving up for a wolf fish or a piranha species, but I'm really not sure which species to get. I've looked into aimara, but i feel like the price is dropping very low, last year they were going for 2k each and now i see some for sale at 600-900. I'm not really worried about aggression, but rather a interactive fish with personality. I've looked into hoplias misiones and some people said they were very active, but culdnt find anymore info on them. As for piranhas I've baught a sanchezi, rhom, and a school of rbp which all of them had been sadly big dissapointments. They were very inactive and skittish to a high level. If anyone knows a type of wolf or piranha which is overall a interactive fish please help me out! Aggression is a bonus! And red wolves, golds, and malas are out of the question. I've kept them before and did not like them very much.