Crocodiles rip off limbs, by grabbing onto one and twisting or spinning their body. The torsion force rips apart any join and even pulverizes bones because of the whiplash effect, as in the case of an anaconda versus a crocodile (cool stuff, by the way).
Then it drowns it's (by now) terminally bleeding prey.
Then it drowns it's (by now) terminally bleeding prey.