VERY IMPORTANT

As of recently, karkinosis torpor no longer gose up with catapults, this is seemingly a glitch but you now have to use cannons

Make sure others see this

Tranq Arrows/Darts DO NOT WORK!!! To knock this out you need to use a catapult and shoot in only on it's back. If you shoot it on it's legs it will kill it.

@Stormwebb19

Cannon balls discrease taming effeciency significantly! So for high tame level, always use boulders. Please let other people know! :)

Trapping it in a simple trap made out of stone double door frames usually helps alot. It will enable you to shoot it with a catapult more easily :)

These things are a must have on Aberration. They'll help you get down to the radiation zone to allow you to get better creatures such as rock drakes. However, they're pretty slow without movement speed upgrades :/

Pretty easy to tame. Trap it in a circular form of stone Dino gates, place catapult low if catapult is high the crab will die. Then shoot it with a catapult. Cannons insta kill the crab, do not use cannons up/vo/te so people can see

If it's getting low on health almost die while taming, don't worry just use owl to heal it up so u can continue to knock him out. Up this please so people can know small tip from me.

To the guy who said "rare on floaty islands on crystal" that is a load of crap found 20 on 1 ISLAND!!!

This tame is like the Rock elemental, but do not shoot it in the head. Shoot it right in the back of it's shell. Anywhere else will kill it fast.

If you are missing with your catapult and it's dying, drag dino corpses to it and let the karkinos eat the corpses. It will heal him up a lot then try again with the same torpor you left off with.

I understand that all the previous tips submitted were useful, but just in case it was not clear, hit the TOP OF THE CRAB, it will have a special animation if you hit it in the correct spot, and will take only a small amount of boulders to tame, even a high level. (Irrelevant with Cannons)