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.
SUPER EASY TAMING!!!...Best place I've found to tame high level Arthropeluras is the cave of the Hunter on the Island, aprox lat 80, lon 53. I usually take a mate boosted pair of Baryonyx, find the large water holes, kill everything that attacks you using the Baryonyx tail whip attack (great for sarcos), once everything is dead look at the bottom of the water, usually there is 3-4 Arthropeluras laying still, THEY WON'T ATTACK YOU! proceed to feed rotten meat (I recommend broth of enlightenment), and enjoy your new demolition dino. PRO TIP: If you're looking for a level 150, kill everything in the cave, leave render, return and there should be fresh spawns. Rinse and repeat 😊 Happy Hunting - Sanch3z
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