The amount of sperm produced by a whale depends on the size of the whale's testicles as well as the type of whale. One example, the blue whale, produces approximately 30 to 40 pints of sperm in a single mating session.
The size of a whale's testicles and penis vary depending on the animal's size and genetic factors. The testicles of the blue whale can weigh between 100 to 150 pounds or more. The average length of a blue whale's penis is 8 to 10 feet with a diameter ranging from 1 to 18 feet. The weight of its penis varies between 390 to 990 pounds.