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
I don’t know if this was just a glitch or if anyone has experienced this, but when I took mine down to the ocean floor, the only creatures to actually aggro to me was the Europtryd. Plesiosaurs, electric eels, the giant squids, even an alpha Mosa didn’t try to attack me. Super slow, but this might be the best tame for trekking the ocean floor.
The Karkinos is a massive crab-like creature in Ark: Aberration that can grab and smash creatures and players. It can also throw them at great lengths. Using its strong legs, the Karkinos can leap to impressive heights.