I think it totally depends on the species. Not to discount individual temperment but some species are just more bullet proof. Gators, Niles, Salts just about any bigger croc will probably do fine. But trigs,palps,osteolamus and even some specs I have had problems with. I guess I like to be totally aware of what they have eaten. A huge enclosure with lots of room to hide with fish. It seems very difficult to monitor food intake.
My hatchling tanks are sparse but I know exactly when they have eaten, how much they have eaten.
It sounds like he has a "nice" strong aggressive animal so it probably won't be a problem.
But for the above reasons I keep my little guys in smaller tanks.
Hopefully one day I'll have so many I won't have that luxury.LOL
D.C.

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