What do sea monsters eat for lunch?

B monsters, obviously.
Get it, sea monsters, C monsters.
Lawl

People Who Make Questions About What They Are Eating.............................................................................................................................................................................................Just Kidding XD(Probably).

It Really Depends If The Creature Is A Herbivore,A Carnivore Or An Omnivore.
If It's The First Then Sea Plants And Phytoplankton.
If It's The Second Then Other Creatures.
If It's The Last Then Pretty Much Everything It Finds !!!!

I think that they eat the idea of fish in a theoretical ocean.