To tame a bary can be easy and hard because if you are taming on panda will make it easier for you to tame it but in water I recommend tame it on land. Use bolas and tranq arrows or a wooden club to knock it out. If you get it raw meat to tame it won't work. So tame it with the preferred kibble or raw fish or cooked fish.
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