Mala is the only wolf I'm aware of that has been successfully and repetitively breed in captivity. But that's by a member in Germany I believe he's the only one I seen report it.
kno4te
might know more on that, breeding isn't an aspect I've gotten into in the hobby.
Get both
lol. And as I tried to stress to jaws, wolves aren't that bad, but they don't back down really, though it's definitely possible. It's more so of what they're capable of without trying, those teeth aren't just for looks. They do damage without trying. I've seen my curu bite plenty of fish. Some you'd see flesh, some just scales would come off, and also seen him kill a few fish with one bite to the face. Tooth would puncture the gill area and blood would come out and they'd instantly turn upside down. So I worry more of the other fish messing with the wolf and it retaliating instead of the wolf messing with other fish, because the wolf will defend itself. This worry is more so for Hoplias. The rest are push overs ime. My gold is a character. Seen him try to fight everything. Think my odoe at have beat him the worse. Saw flesh. He went back for more though lol. He tried to fight a wyckii after the wyckii ran from the curu, rubbed on then bit the wyckii softly, as if investigating, the wyckii turned and bit him back and he ran. Reminded me of a kid kind of watching two friends argue then poke one to see if they're fine but gets yelled at and runs off.
Only thing I've ever had push a wolf over is a big male jag. They outright fought for about ten minutes, both about a foot. Wolf but the jag, the jag tried lip locking with it. They both came out fine, jag made the wolf back off. And then a large artc killed that mala outright. But that mala wasn't much of a fighter, he was gentle. The one I always say is my favorite, pet him picked him up out the water for a little to see how much he trusted me lol, he hand feed too, hovered all day begged for food like a cichlid. But that's rare. Had him for a few years. The reason I got my 120.
I'll add, curu I notice are more agro towards fish that look like themselves, they are definitely the least likely to accept other wolves. Where as you can keep malas together no issue, like bichirs almost, a curu isn't gonna be the same. My gold worked with my curu in the 120 so you have a 300 you'll be much better off than me. If it's in the budget I'd get both personally and a mala. They're like bichirs to me lol I want them all.
And here I go yet another lengthy post on wolves lol sorry..