Taming a big crocodile? you came to the right place. here are things you need

1xTrap [OPTIONAL]

a bunch of prime fish meat

Tranqs or slingshot

bow/crossbow

Make sure to stay alert if there is other harmful beasts.

This Croc is fast,big,and strong.

Knock the croc out.

Feed prime fish meat

takes 5 minutes [No Narcs needed]

Voilà! big croc