When you ride them they can float on land!
Manta

Player-written tips for taming, using, and fighting the Manta in ARK: Survival Ascended & Evolved.
This tame is absolutely garbage, use a sarco instead then this garbage
TAMING IT NEED ANGER GEL? WHERE TF WE GET THAT
Pro tip for mobile players use 10x smoothing balm
Anyone know that this creature actually can go on land?! Yeah, it can. Just stay on it and it will stay alive~
-Floofff
It will Target icthys. If you tame an Icthy, keep it away from wild mantas. Up so noobs can see
Once tamed they’re good for getting around the sea, an alternative to an ichty although ichty is miles better, if I have the gear in most saves if I find a better lvl manta than an ichty I’ll tame the manta,
my first tip