I don't know if I can call it luck but I just found 3 otters lvl 150(yes, all 3) cilling in the swamp near the Redwoods. I managed to tame only 1 'cause of kapros... Btw I am playing ark mobile and i noticed that otters are not tameable in the usuaal mode, with dead fishes,you have to feed them fish meat. I hope that helps and pls vote up so dododex update the taming method for ark mobile
Just push this cute lil creature in front of a giga and it'll have an existential crisis. Realising the path of destruction it left in its wake and deteriorate in front of the otters blue sparkly marble eyes
It is tamed in the same way as the Hesperornis, where you have to carry a dead fish to it. Larger fish, and those caught by Ichthyornis, apparently work better. Piranha are better than coelacanths for taming, and salmon are better than piranha.