Get a tuso and grab him and drag him to surface. He will try to run because your so high up but that fine just re grab him. Then get him beached, in a trap or stuck in some rocks and there you go.

Easy tame if you use a Behemoth Gate trap, place four gates down and one door on each end, leave enough space you can swim through with an Ichthy, have one door on the gates at either end, leave one closed, get it’s aggro on lure it in, swim around behind it & shut the door. Tranq and kibble. Easy Mosa.

Bring an Itchyosaurus with you since they're pretty fast and things won't aggro it (at least on Mobile idk about PC/Console). Have a LOT of tranq/toxicant arrows, and search for your Mosa. When you find one, shoot it and let it follow you up to the surface.

Mosasaurs have a certain depth they need to be so they'll stop aggro when you reach a certain depth (near surface) and go ham with your special sleepy time ammo.

Make sure to watch its HP and Torpor so ALWAYS BRING A TELESCOPE WHEN TAMING ANYTHING! Don't kill the poor guy.

Give it some soothing balm if you can and feed it some prime fish and so on, use BIO Toxin to keep it asleep (you can get some from Cnardias probably nearby). Boom! You've got the Giga of the sea.. Sorta.

Hope this helps and good luck!

in ark mobile just kill it and grab it's implant make a revival platform put revival platform in the water under the red oblisk revive it there you go it will not move since it has a depth limit sometimes it might try to swim away from you and it stops since it has a depth limit it's easier to tame and much more expensive to revive lol

Tamed a 135 with a wood trap, a crossbow and a diplocaulus day 2, no where near as hard of a tame as it seems. No scuba no harpoon no stone, took maybe 2 hours and only that much because jellyfish killed me

Ok here’s what you gotta do. First tame a turtle and name it sacrifice then cryo that guy and find a tuso then tame a tuso. Ok so with the tuso grab the mosa and bring it to the surface. At a certain point near the surface it will completely stop moving and if it does it will only move down. Also when carrying the mosa with a tuso the mosa will attack it unless you bring it above where it is supposed to be so just swim up with it and it will eventually stop attacking. Up if you want idc

This is an easy tame, just get an itchy and shoot tranq darts at it while a couple body lengths above its head, mine dissapeared due to a glitch though (in mobile)

My favorite way is to tame an Ichthy, Build a trap like the wyvern trap on the bottom close to their spawn, and using a high lvl Ichthy with high speed and stam, kite it right to the trap. The rest is simple.

HIT AN AMMONITE THATS NEAR A MOSA AND LURE THE MOSA TO THE TOP OF THE SEA! IT CAN GO THROUGH THE BARRIER IT NORMALLY CANT GO THROUGH THEN IT GETS STUCK SO ITS EASY FOR YOU TO KNOCK OUT

First to tame it you will need to get your scuba gear and a lot of tranqs to knock it out next you will need to find one you can find one on the edge of the map border and you can find them at the bottom where you find Pleids and dunks make sure to kill the pliers or dunks for a chance for it to spawn there and once you find a miss you can trap it with the rocks around it or use a fast water tame to get away and fire your tranqs to knock it out and feed it meat (prim meat works the best)and feed it loads of narcotics and meat and you have tamed a mosa also if you don’t keep them fed they will gain a lot of torpor and go into a coma for a while so KEEP THEM FED

They are super hard to find and when I was thanking I went to tame a manta I come back it was gone so beware of that my ickey is what I was riding you can shoot off of them that is what I was doging

Anyone have tips on making a trap for taming? I’m not exactly and fan of the ocean in ark and these would help.

Use a Tuso to drag it up to above its rise level after that make sure somethings under so it can't go back down after that tranq it with 100000 arrows

I was new to the mosa taming until last night when I found a 140. Just stay above the depth limit or trap them into a rock. I starved my mosa because the last update released the eels and you don't want to lose taming efficiency.

This is more of a question but a level 14 one spawned near herbivore island where I live but it wrecked me and my level 40 basilosaurus. I saw tips saying I should get it to follow me and there are ammonites down there but that agros everything. I can’t afford to miss a shot though.

An easy quick way but also a bit unreliable is To get a high health water creature like the mosa right under its depth limit wistle passive on the tame and shoot tranqs at it until it flees not recommended for higher levels but can be countered with better saddles

I kited an X-Mosa into the Oxygen Bubbles, still took hundreds of tranq arrows but it makes it easy to stay alive, breaks a few bubbles so make sure there are a couple around.

Go to fjordur n travel around deep cliffs not to deep ocean pit for a non violent easy mosa tame just a chase beware of the paparazzi though

It took me a long time and I got it self a tel saddle

Im used to explore with a basilo when im going to tame these bois i also love them they are very fast and good for farming angler gel, prime fish meat etc also you can have the alphas but only in creative with forcetame also try alphas!! They are extremely fast -Diego