Fun fact you cant feed it a Megalodon.

Even a fat Sabertooth salmon takes it 17.5 percent.

But just get a wooden cage go to the duck have it attack you go behind the cage it will go into it and just close the cage, then feed it fish carcasses

Place a cage and punch it. Leave cage open and punch it go on the side that the cage is open and it will walk in and close it then place sign. You can then open it and feed it without it being able to leave. Saber & piranha is the best. Side note seemed the faster I would feed it the more it went up in taming. (Did not look at the size of the fish.

Use an itchthyornis to gather fish for it. The buff increases efficiency.

Ark mobile revamp tip

Kill salmon 0.7x size or below don't even try the bigger ones it'll block your view that will make it harder, now drag the fish go near this biatch then click the dino paw print where the whistle button is also located click "feed fish", sometimes it'll show release instead so be patient Xaxa

They deal hundred millions of damages to fish... but only does 1 damage to other creatures

ok

The most frustrating thing about taming these guys is not only do they take a lot of fish but the same button to feed them is the same button to drop the fish(i don’t know if it’s different in pc or ps4)and it’s constantly swinging around your face making it annoying because you’re constantly dropping it. Either make it so the controls to feed them are different then dropping it or make ur so it’s not constantly in ur face.

Don’t be stupid like me. I was dropping fish after fish in front of it and was wondering why there’s no taming bar. Didn’t realise you have to passively feed it not just drop a fish in front of it.

I haven't encountered these yet and this is just a maybe but i think maybe you could use a pteranodon or some other flyer that can pick up animals, you can make a 1x1 hut without a roof and drop it there, and make it be right next to a water source with fish to make the process quicker. If the water source is shallow enough you could use something like a trike or a baryonyx to insta-kill a bunch of fish, and I'd probably recommend saber-tooth salmon since coelocanths give too little taming effectiveness and i don't think piranhas are worth the hassle.

Like i said, all of this is a big maybe, and maybe it doesn't work

Feeding them sabertooth salmon seems to work the best.