An Ark dev said that these will be tameable in the future!

Tamable using fish baskets from aberration. They seem to flee from the baskets once placed. It is a good strategy to pen then in with fence foundations and walls, or kite them to a pen. Place your basket on the other side of the wall and catch.

You can tame them with a fish basket, catch them with fish basket and release in water and it's tamed

Place a fish basket to tame this.