Those who say it's very dangerous are crazy. Just bring a long neck rifle, one shot or two and boom. The first time I entered the South Cave, I tamed an scorpion and it significantly helped me to take care of the Arhtros and Boas.
Most of the creatures have arrows in their loots, so if u prefer a ballesta to deal with these bad boys, you are not running out of ammo any soon.
Use the broth of enlightment, since it is their kibble. If you use a broth of enlightment a a balm it I a insta tame, since authors take forever to eat. You can find the recipe on google or something, be warned, it is EXPENSIVE.
Easiest and safest way to tame this is to lure it under water. They stop aggro and you can tame as you please. Just make sure you come up for air every once in a while. Also be sure the water is deep enough.
Full Ghillisuit, bug repellent, and balls of steel because these are scary to tame! They have the taming slot right behind their head about where the saddle would normally sit. Must approach from behind and only approach when feeding, stay away otherwise