I think its one of the silver arowanas. Its going to take a lot to beat a 19" RCK unless its just a wimpy one. I don't think the 24" black arowana could do it without getting major injuries as its too close in size. Heck, from what I understand, a CK or RCK actually tend to win fights against arowanas (excluding Jardini) if they are close in size. The silvers have a big size advantage over the knife. I can't imagine a 17" ornate bichir trying to take on a CK or RCK of comparable size, but I can imagine an ornate killing a cichlid like your flowerhorns. However, if the ornate were the culprit, it likely would have torn chunks out of the fish. If anything, I'd think the knife would probably take out the bichir if they came to blows. Fire eels are peaceful and the peacock eel is too small to do squat. (I don't know how a 10" peacock eel can survive with a 17" ornate. lol) The stingray would have likely left a puncture wound, so that rules it out and I don't think the gar could beat a CK or RCK unless they just sat there and let it bite them. Everytime I've mixed CK's with severums, the CK always domininated and I seriously doubt a severum could take out a FH larger than itself. I doubt a dat could take out a FH close in size as dats tend to lose against lesser aggressive fish like oscars and even leopard ctenopomas.
Anyway, I think one of the silver arowanas are the culprit because they have the size advantage, the means and the potential attitude.
Anyway, I think one of the silver arowanas are the culprit because they have the size advantage, the means and the potential attitude.
