Although my fish abuse SpongeBob, and he's mostly just a place for algae to grow on, I like the kitsch that it adds to my aquarium. However, it makes me sad to think that SpongeBob can't go home, since there is no pineapple in my aquarium. Perhaps it's time to pony up the cash:

Now your fish can live in SpongeBob's tropical abode! Molded pineapple design with a door and window openings for fish to swim through. This great aquarium decoration is recommended for 10 gallon tanks and larger

[ SpongeBob's Pineapple House ]

Or, perhaps I just just get a small crab pot, and mock up the Krusty Krab.