The voices blended with the roaring kaprosuchus, giving his demons physical bodies. The horde of predators stampeded after him as swift as lions.
So lizards can't actually breath and run at the same time due to their muscle placements, but crocodiles can so maybe this is possible?
they wouldn't be roaring though, crocodiles can't roar and roaring is used when an animal sees something as a threat. if it's just hunting it won't be roaring

