I know you can set up traps, but so far I've had the best results by just shooting it in the face with tranq darts; don't bother running/kiting it though, it's rather fast so just bring armour and make sure to eat.. seriously keep eating, your gonna need the health bonus if its a high lvl.

Ps: currently breeding mine, they all eat fishmeat! Even th babies, recommend having an extra bary on aggro by a lake! Good luck taming and/or breeding these weird little creatures!