From a bad experience with these things, I would not recommend killing them in the water because they are faster than any water creature I have ever seen. I also recommend that if you are a noob (like me) and don’t know how to kill them properly and think you can lead them into a triceratops or something to let them attack each other, it won’t work. Once they lock on to you, they won’t attack anything else until it finds you and completely destroys you. TIP: The only thing you can do is a get high ground and hit them with anything long range.

Good mount fast and can swim. Many says it is one of the best cave mounts. But for me every cave has its best mounts. It is best for swamp caves. The reason why its not good is because it needs fish meat. You don't get fish meat available in all caves. Most you encounter are raw meat givers. You can increase lost health by feeding meat or non veg to the respective dinos. I am taking a very basic perspective of cave venturing scenerio. So you have to pack a lot of fish meat before going in or something else you can do for this. Or just take a good level meat eating mount.

Hands down one of my favorite tame! Super underrated A must tame! I used it for my first underwater cave, it handled eels well but I wouldn’t recommend picking fights with them. Spin is amazing ! I tamed a plesiosaur with it all I did was turn in circles and shoot and it was very easy! GET THIS DINO!!!

If your planning on taming a high level, over level 100,

Bring at least 75 or more depending on what level above 100. DO NOT shoot these Dino’s from a rock. Barry’s are fast as heck and they get away easily. You can bola them but they’re gonna break out before you knock it out. If it is a high level like over 100 like I was talking about earlier, make a trap with doorframes and the ramp if you don’t want it to get away.

Definitely recommend it is amazing for taming underwater dinosaurs that are affected by its stun and are over all is a really swimmer and can travel semi-fast on land only down side is that it is a piscivore which means you can only eat fish but over all a very recommended tame!!!!!

Baryonyx is perfect for the lower south cave! They are slim, so any that creates a small and slim space ii will fit (just have to ride it through those parts or struggle coaxing it out). Also it can swim pretty fast. Think of it as a spino for the lower south cave. It can swim fast, run fast, can kill fast, can stun in water, and can jump. It also can breathe underwater (unlike spino)! It has saved me from having to go into the cave again due to megarabies (I'm on PS4 that's why).

Ok heres how i tamed one like 30 mins ago

It was a lvl 8 (i play on single player easy and casual )i put down a large bear trap and shoot it to agro on me and boom it got trapped and then u just trank it out and feed it ,i got the taming glitch at first that pumped up 21% and i had a soothing bam so it was smooth like butter (yes i know i dont knoe how to pronounce)