Dont let it kill you and you will live.

If you see this thing just keep swimming just keep swimming

Be sure to put your giant turtle full of c4 dodos right in its mouth to maximize your damage

Mosasaurs with Tek Saddles are your best bet against her, bring Megaladons for the babies.

Just don’t die to the giant coelecanthus on drugs

Mama eel is scared of an army of max mosas but you should ride a max tuso when fighting her

Ok well here's a REAL tip.
I suggest bringing atleast 6 lvl150 mosas for gamma.

20 lvl 150 for beta, and a few extra tames like a basilo or two, lvl 100.

25 lvl200 mosas and any other tame including lvl150 basilos.

Warning: this is a boss under water to fight use 20-50 tex mosasaurs depending on the level of both creatures.

Your gonna need a bigger tame.