Bikini Bottom is under the Bikini Atoll is the Pacific Ocean.

in the bikini bottom

No, but Bikini Bottom is based on Bikini Atoll which is located near the Marshall Islands in the Pacific ocean

A bikini bottom is the lower part of a two-piece swimsuit for women. It typically covers the groin and buttocks, and comes in a variety of styles that offer different levels of coverage.

aired legends of bikini bottom;The monster who came to bikini bottom,Welcome to the bikini bottom triangle,The main drain,Sponge-Cano

unaired legends of bikini bottom;Trenchbillies,The curse of the hex

you can still watch the unaired legends if you buy the DVD Legends of bikini bottom