Who is to tell us that we can't get a Pliosaur/Plesiosaur with limbs meant for land.
Who is to tell us that we can't get a bipedal shark, a la Knifehead from the Pacific Rim movie?

It's a fantasy game with various creatures that may be based on, but not directly taken from real life. Think six-legged crocodiles. I wonder why I ever thought this kind of thing was an issue. They could just design aquatic animals with land attributes.
In fact, a special exotic family like Spirit Beasts, but then for aquatic animals/sea monsters could be a really nice addition.
This was just something that entered my head all of the sudden.