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 Liopleurodon taming details, get the taming calculator app.
If you look on here right now they are saying that they are a waste of time but there was a recent update for them in the quality of life update makeing them 6 hour tames instead if 30 minutes hope this helps
With the update the buff lasts 6 hours. HOWEVER...
if you fast travel with a bed, you lose the buff
Liopleurodon is also aggressive to tames. It has the same ocean depth cap as a tuso (so it won't chase you to the surface) but it is passive if you're swimming