what is goodbye mr. fish?
Second episode of the of the American sitcom "The Cosby Show"
Goodbye Mr. Fish
Goodbye Mr. Fish" or sometimes "Good-bye Mr. Fish", "Goodbye, Mr. Fish" or just "Mr. Fish" is the second episode of the of the American sitcom "The Cosby Show". 
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Goodbye Mr. Fish [SEP] Introduction
"Goodbye Mr. Fish" or sometimes "Good-bye Mr. Fish", "Goodbye, Mr. Fish" or just "Mr. Fish" is the second episode of the of the American sitcom "The Cosby Show". The episode was directed by Jay Sandrich and written by Earl Pomerantz. "Goodbye Mr. Fish" originally aired in the United States on NBC on Thursday September 27, 1984, at 8:00 PM Eastern time. The episode focuses on the death of Rudy's pet goldfish, which was difficult to explain to her and difficult for her to deal with. The episode was a critical and commercial success, achieving both high ratings and positive critical feedback.