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.
I killed these guys with ez just taame a icthy and craft saddle(or just do quest tame ichty when its tamed free saddle) And kill em ez imma tell one more time tame icthy put on saddle ride icthy and KILL THESE BAD BOYS BABY