This is like an earlier tame of the spino. It's incredibly fast, but can be bola'd and tranqed easily if you're smart about it. Keep in mind that it only eats fish meat (before AND AFTER being tamed) so keep it stocked on that. You can also pick it up with an argentavis despite it looking humorously impossible. Besides that you can do the rest :)
1: Do not fight them in water under any circumstances
2: Lure them on to land
3: Use a bola
4: Attempt to Tranquilse with bow and arrow or better
Remember: They can only be tamed with fish meat and they usually kill all the fish in the area so you should probably have some prepared beforehand.