After the initial feeds, it will swim normally if your mounted. Once you dismount, it will swim directly away from you. Use this mechanic to beach it and stay behind it in the water so it does not flee to ocean. Be mindful of piranha and land Dino's.
Best for killing scorpions on bottom of ocean floor since they don't take torpor. Scorpions down there will knock any other animals out. Once you kill it, hit it with a pickaxe to gather black pearls. Very useful for the next update with tek gear.
!!!find any animal you may have lost on mobile !!!!!!
Go to your profile and it should say tames _/_ tap that and then it will show you all the animals you’ve tamed that are alive. Then go to the one you lost and hit request! Hope this helps anyone who needs it.