This is the weird prehistoric sea creature called the Odobenocetops and is a marine mammal of 2.1m long; it is a carnivore and lived 3-5 million years ago.

The Odobenocetops did not have any teeth so had to suck its food out of hiding places plus it has lopsided tusks, sounding more like the elephant man to me.

Basically this sea creature is crossed between a walrus and a manatee (well that is what it looks like anyway). It apparently liked swimming in shallow waters staying as close to the seabed as possible because that was the safest bet for it to survive.

Source - BBC