This dinosaur is a very intricate but interesting dinosaur to get. I did find it near the shore line as it had seen me and wanted to eat me. However I had 5 tranq arrows which you can get at lvl 21. I shot all 5 and he fell to the ground. Very good dinosaur to tame especially in the water. It beats anything in the water even with its stun strike. I recommend using this dino to fight. I have one named Juju. One like equals One love for Juju
If you can, get one of your high HP pets and get it to fall asleep near where you want to tame this bad boy. Lure it over, and when it starts attacking your bait, you've got a bunch of free tranq shots on a stationary target.
Addition to my tip, I forgot to say that I play Mobile on Brutal difficulty that's why so many tranqs XD it slipped my mind. Dododex doesn't let you edit tips so had to make another. Sorry for confusion guys.