Hooray for Bubba, the sex-change fish! Bubba, a member a rare and endangered species of grouper, was found in a bucket 16 years ago and brought to Shedd Aquarium in Chicago. Back then Bubba was a girl, and the aquarium kept him because of his rarity. Due to a process known as ?protogynous hermaphroditic,? Bubba became a boy ? and one of the stars of the aquarium. Unfortunately, his keepers discovered a tumor on Bubba?s head in 2001. Now, thanks to a ground-breaking operation involving a tumor removal and a pigskin graft, the doctors have been able to treat Bubba. Who?s doing fine, by all accounts.