Ebirah swam out of the ocean in Godzilla vs. The Sea Monster, and returned in Final Wars. As you can see, Ebirah is a GIANT LOBSTER.....

Other than that my biggest complaint is, when I thought of Godzilla vs. The Sea Monster. I expected an interesting monster with tentacles or a shark monster. Not a giant lobster.

On a side note. Just because these monsters are on the list, doesn't mean I hate them. I like Kamacuras, and Kumonga is cool to. But just think of all the other interesting and cool monsters Toho could have created, instead of super-sizing animals.