this little guy is the sea equivalent of the equus, you get its saddle after you complete the taming pursuit (very early) and the taming method is passive, this creature is docile and is very frequently found along the shore of the mainland and the herbivore island. very fast and has stealth (just like cave creatures) in the mobile version for some reason
on mobile they behave like cave creatures: creatures will rarely aggro you when you're mounted. in the rare occasions in which they do, they'll only attack you once before de-aggro'ing, so the relatively low base stats won't be much of a problem
I have killed so many megalodons, trikes, stegos, carbonemys, sarcos, and even theris. They are deadly things. If you can get one and get a saddle for it, then nice job, you have an oceanic friend that can easily harvest fish meat and normal meat, also keratin. Another thing is that nothing seems to agro on you while your on it, although, sometimes they fight back, other times, the creature won’t attack. For example, a therizinosaurus. Just make sure not to attack any glowing jellyfish.
Please don’t be fooled. All these people saying they won’t get attacked is a feature on MOBILE ONLY. Even on pc or console, there’s still good tames. While they’re not great harvesters and don’t have much health, food, or stamina, they're easily capable of outswimming everything in the ocean. Those stupid megalodons don’t stand a chance.