My best tip in taming this thing is carrying your buddy with a pteranodon and then dropping him into the water beside it, he will swim to sure leading the bary behind him(while being torn to shreds), then while the baryonyx is eating him you can casually bola it and then knock it out.
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
These guys are pretty common around swamps, and sometimes you will find one along a beach. To tame them just make a 1x2 trap. I’ll list the items that I used; 2 wooden foundations (wood is just the minimum, I recommend stone.), 6 wood door frames, and a wooden ramp (this is just for the trap). You will need around 1 tranq arrow per level, or one tranq dart per 5 lvls (Make sure to shoot their head with tranq darts). Depending on the level and taming effectiveness, the amount of narcotics and food needed may vary. I would just bring however much food/narcotics you feel comfortable with bringing ( I would recommend raw prime fish meat, but if you have a lot of narcos you can use normal fish meat).
Thanks for reading, even though it’s pretty long. If I get 25 ups I will make a kapro taming guide!