ARK's base taming speed on PC, PS4, and Xbox is now doubled, meaning 1× is as fast as what 2× was previously. Dododex has been updated to reflect this. Use the "presets" dropdown for common multipliers.
For full Mosasaurus taming details, get the taming calculator app.
An easier way is go on a itchy and find the nearest ammonite and hit it and them go slowly with the rage effect until you find one and yes i know a lot of sea creature will come so be carful when you do it (maybe you can find a squid like i did)
JUST TAME A SQUID GRAB THE MOSA,DISMOUNT THE SQUID.....and put the Squid on passive I will no let go of the mosa.AND THEN THE SQUID WILL BE DOING TORPOR AND ALSO YOU CAN HARPOON IT OUT AND TAAAAAAAAAAMMMMMMMMMMMMMME!!!!
An elusive marine lizard and reputed as one of the largest creature found in the waters, the Mosasaurus is much more powerful than any known aquatic beast encountered in the depth. While its sluggish speed may put off some survivors, being ambushed by one can mean a certain death.