Me and my buddy just tamed a 145 by building a trap against our north tropical bubble. From there you can actually reach the plesiosaur from the inside and tame it using darts to speed up the torpor process. From there it's just a waiting game. You can pretty much use any trap that you can use for wyvernd. Behemoth gate frames and one gate or conservatively use one gateway and door and pillars and ceilings staggering it down so that if it swims more towards the bubble it'll be way easier to hit
My trusty sarcosuchus made knocking my plesi exceedingly simple, for three reasons. The sarco is fast, it ascends quickly, and you can shoot from its back. Once I separated my plesiosaur from her friend and killed it, the procedure was simple. When the plesi reaches a certain height it begins to flee. I dragged her up then filled her with tranqs until she aggro'd again. Repeat process until unconscious. Simple with sarco.
There is a glitch at the redwood on the center, where plesiosaurs will spawn really near the coast and whole groups of 2 or 3 are glitched in the water, meaning you can knock out multiple plesiosaurs at the time.
Taming one is not too difficult. A high level won’t take too many tranq to knock out. When it’s knocked out, feeding it a soothing balm will allow u to tame it quickly, even with regular raw meat. Don’t forget to separate the plesiosaur u want from others in the area. Good luck!
The trick is to argo one, have him chase you into an underwater cave where he will not be able to fit through the door but his long neck and head does. when you do this he will not de-agro, you can then get a clear shot from the cave with a bow and tranq arrows
To the guy from December 2020 whom talked about the no air pursuits
Get it right, man
A no air is hard without cheese (cheese strat at the end of this)
B lazarous chowder isn’t good. Scuba tanks are waaaay to easy to get at the point you unlock the pursuit. (Around lvl 75)
C it isn’t always mastercraft it depends on difficulty you we’re lucky enough to get a mastercraft on easy or medium.
Cheese: make a bed at one of the underwater caves, then put all your stuff in a chest or box, after, kill yourself or teleport to the bed, once your there, you may want to swim a little further. And boom your done. (Maybe teleport a strong or fast water mount down to you, are if your in multiplayer, teleport a sarco, Baryonyx, spino, or diplocaticous down to the bed.)