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! :)

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

DONT USE CANNON BALLS!! They drop taming effectiveness down to 63% boulders are the way to go. Place three stone gateways in a box shape. Put a large bear tarp in the middle lure him to it. Put the other stone dinosaur gateway to close the trap. Place a catapult on a paracer platform saddle and only aim for the head. If it rotates in the trap just keep moving around on the paracer until you get some shots on him. A Max level takes 16 boulders to the head to get knocked out. If you do it right when it gets knocked out the taming effectiveness will be 100%

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

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)

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 just figured out that rocket launchers deal torpor to the karkinos, much like the rock golems, but they die a bit more quicker since they don't have much health and rocket launchers deal a lot of damage.

I just figured out that rocket launchers deal torpor to the karkinos, much like the rock golems, but they die a bit more quicker since they don't have much health and rocket launchers deal a lot of damage.