Epi

From what I've seen they actually tend to beach themselves a lot, both when attacking you (they appear to be aggressive despite being a passive tame and it doesn't seem like there is any way to not aggro them and still get close enough to feed them.) and attacking other things. They are extremely fast, especially once tamed and if they are set to follow you, they can kill themselves by flying out of the water and landing on the beach. I've lost two already to this, and more than a dozen I've tried to tame as well. It's quite irritating, so unless in the open ocean I wouldn't suggest leaping out of the water while riding it. As I'd assume the same thing would happen if you were riding the manta and you beached it by accident.