The amount of sperm a whale produces depends on the size of its testicles and the kind of whale. In a single mating session, the blue whale generates roughly 30 to 40 pints of sperm.
The testicles and penis of a whale vary in size based on the animal’s size and hereditary variables. Blue whale testicles can weigh between 100 and 150 pounds or more. The penis of a blue whale averages 8 to 10 feet in length and 1 to 18 feet in diameter. Its penis ranges in weight from 390 to 990 pounds.