Tetrapods Came from the Ocean

This trope is a fish coming onto land on a beach from a large mass of water, presumably from the ocean. This portraying evolution, or a gag based on evolution, incorrectly. Tetrapods probably came from fresh water Hence why amphibians, the intermediate evolutionary step between other tetrapods and fish, live in fresh water, for at least part of their life cycle. Of course this trope may have actually been the scientific view, but its not anymore (if so, if someone could give a date that would be great).

Western Animation

 * In the beginning episode The Parasite of Teen Titans Go there is a gag along the lines of this trope.
 * In the "Homer Evolution" couch gag of The Simpsons, Homer as a primitive tetrapod crawls out of the ocean (or at least a body of water with an octopus in it).