They have terrible turning circle, approach one from above and feed it. Then let it swim circles around you. The occasional time it gets close you can predict its attacks, it “bucks” just before the attack, which is the tail swinging underneath. Quick swim up or back avoids it. Be prepared to get dizzy, long time between feeding
Tame a kaprosuchos and swim to one of these bad boys and do it's alternate attack it will grab it in it's mouth. walk onto the shore where its safe and have another person feed it while in the gators mouth (if you unmount it drops it) it wont attack or die because it's technically not on the shore.
Taking it is actually pretty easy,just ride on your pelagornis and slowly start feeding it angler gell(which can be found in snails on mobile)make sure it’s near shore and away from predators!(like other mantas)its a passive tame so make sure not to get killed in the process
If you go on the Ragnorok map if you go too viking bay 3 and go to the bottom of the ocean not far from the bridge like rocks a giant manta the size of a bronto will spawn and it is called the manta king. It is very easy to kill despite its size. Your welcome!
Surprisingly in mobile ark, if you attack achatinas with raptors, as I have learned from my own experience, you can get angler gel. I have never gone past the shallows in the ocean, yet I have multiple stacks of angler jell. Hope y’all can find this helpful. Don’t know if it works on other versions of ark though.