Now earlier, I mentioned the T-Rexs ov da sea, aka the Mosasaurs. Just how the Elasmosaurus is a Plesiosaur, and the Shonisaurus is an Ichthyosaur, the Tylosaurus (^ pictured yo) is a Mosasaur.
The Tylosaurus was one of the bigger mosasaurs, growin all da way up to 15 meters (49 feet) or mo! Das a fitty foot sea serpent with fins and big ol teeth. Apparently, monitor (not yo computa screen silly!!!) lizards and snakes r said to descend from this leviathan.
If yu aks me, the Tylosaurus deserves to be in the category of T-Rexs of the sea. A certain characteristic special to them was their cone-shaped snout. None can say fo sho, but it is thought they used this to ram and stun prey. Tylosaurus was one badass muv no doubt bout it.
Pokemon Tylosaurus would be way stronga than that (over 9000 everything imo)