EDIT: It should also be noted that when I lived in poor neighborhoods, many of my friends had very elaborate salt water aquariums - sometimes costing thousands of dollars! I had an aquarium myself!
As I became more wealthy, I noticed my peers didn't have this crap. Wal-Mart has a HUGE aquarium section, which tells us a lot. The latest thing is fluorescent fish, genetically engineered so they glow in the dark. I kid you not.
Hollywood movies always depict "rich people" as having exotic pets and enormous aquariums. It is the white-trash view of wealth. I suspect Warren Buffet doesn't even have a gold fish! He does, however have (or had) a Labrador Retriever - about as un-exotic as it gets.