Did you guys know that especially arthropleura can be easily kill with range weapon. For examplelike bow, crosbow, longneck rifle and much more, just promise it was a range weapon. Shooting it with any range weapon will rate the damage taken of it. Also attacking it using any melee weapons or hands is the worst idea ever! It can inlflict 300% of damage taken to yourself if you attack it with any melee weapons or hands while tamed creature only take 0.25% inflicted damage to itself. Beware, arthropleura poison will slighty drain your health but dealt a massive damage to your armour. It is very usefull in PvP to breakdown a metal foundation, but sadly, arhtro is not that very good swimmer, not fast, and not even carry a big amount of weight. Lv 1 arhtro can only carry much as 100 Kg.