Full ghillie suit and bug repellent. Equip broth of enlightenment or raw meat in past inventory quick slot. Sneak from behind feed passively let it starve and repeat. If taming in a cave lore all wild creatures always from the arthropluera and kill them off. When you tame all Dino and creatures will turn on your tame so you will watch your hard word perish. Bob and weave ovoids most cave creatures actually landing a hit especially Onyc. Use a shield for stop spiders and scorps. Lots of stimulants and tbh caves don't seem so scary. Good luck.
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.