Trapping- it's a 3 for 1 trap. Trap will work for plesio, moss, Squid. 4 sides of behemoth gates. 4 corner inside trap with pillars higher than gate. 3 Celling on each pillars going center of trap. So only a small gap in center. Now take a small angler or ichy or shark. Lure dinos in and get out from top and close door.
Early game taming trap for big water dino. Now your problem is getting it tamed after that. They take a lot of ressources to tame.
I would suggest plesio and kill other stuff with it like alpha to get black pearls and Lure squid in same trap.
There is an invisible barrier at a certain depth that the plesis will not cross, you can drag them up to this and shoot them till they deagro, when they do reagro and repeat until their knocked out. Also, you can drag them to the entrance of an underwater cave, and shoot the plesi, as long as you dont venture too far into the cave, it will not deagro.
Since a certain update, you can no longer get the plesiosaur to chase you up until it can't reach. When it can't chase you anymore, it will run away every time. Bring a dunk and let it munch on it against a wall. Especially on Ragnarok, the ocean is very open on there.
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.)
guide on how to tame a plesiosaur: I used my 20 k basilo for this, so go up until the plesio stops aggro, if it doesnt aggro after a certain depth. thats perfect, now all you need to to is go a little bit deeper next to the plesio, whistle my 20 k health tame and let it soak. now i used my basilo because of its regen, so it will stay alive for years. anyways, i shot it with my ascendant BOW instead of crossbow because since the basilo is tanking the hits, its distracting the plesiosaur. So I dont really need to move, then i sucked more oxygen from the diplocaulus and kept shooting and finally the plesio swam away, then a few moments later it gets knocked out and boom. you got a plesio ;) (I also used a taming balm, rex kibble because im mobile, and some prime meat and fish meat)