Goo Lagoon is an underwater ocean of sludge that Bikini Bottomites use as an underwater beach. Goo Lagoon is a regular hangout for weight-lifters like Larry the Lobster, who is also a lifeguard there. In one episode, "SpongeGuard on Duty," SpongeBob becomes a lifeguard at the lagoon, but is unable to do the job since he (ironically) cannot swim.
This is a list of episodes that Goo Lagoon appears in:
To be added.