Bubbletown Prison is a governmental institution that appears in the episode "Bubbletown."
It looks similar to the Bikini Bottom Jail but in bubble form.
Role in episode
After SpongeBob accidentally caused a huge amount of damage in Bubbletown, he is arrested and sentenced to three life terms in Bubbletown Prison.
Mr. Krabs discovers his current state and attempts to bail SpongeBob out of jail, killing the correctional officers in the process. It then pops due to the fight Mr. Krabs engaged in.