In 'SpongeBob SquarePants', where does SpongeBob work?

In 'The Simpsons', what are the names of Marge's twin sisters? In 'The Simpsons', what is the name of the family dog? In 'The Simpsons', what is the name of the family cat? What cartoon-within-a-cartoon do Bart and Lisa watch on 'The Simpsons'? In 'SpongeBob SquarePants', what kind of animal is Patrick? In 'SpongeBob SquarePants', what kind of animal is Mr. Krabs? In 'SpongeBob SquarePants', what is the name of SpongeBob's pet snail? In 'SpongeBob SquarePants', in which underwater city does SpongeBob live?