Poliwag Tank Tops
Poliwag has a black and white swirl on its abdomen, which are actually its internal organs showing through its semitransparent skin. The swirl looks clearer after it eats, and the skin is very elastic so that it will not break if the Pokémon is bitten. The direction of the belly spiral differs by area, with the equator being thought to have an effect on this.
Tags: poliwag, pokemon, frog, poliwhirl, poliwrath