A lot has being said about the musky fellow but..
Blue whales have the largest genitalia of any known living animal.
To protect their sexual organs from injury and streamline their body when swimming, their genitalia is often hidden within a genital slit during normal daily activities and becomes exposed during sexual intercourse.
The size of their genitalia can vary depending on genetics and overall body size.
On average, their genitalia length is estimated to be between 8-10 feet long.
Interestingly, although their genitalia is relatively long, the average diameter is estimated to be about 1 foot, with larger whales growing between 15-18 inches in diameter.
The estimated weight of a blue whale’s genitalia is between 390-990 pounds, depending on its overall size.
Additionally, their testicles are also relatively large, weighing up to 150 pounds per testicle, with smaller testicles weighing 100 pounds or less.
During sexual intercourse, a blue whale can ejaculate as much as 30-40 pints of sperm in a single session.
This large amount of sperm increases the likelihood of producing a successful offspring, and in some whale species, it helps to wash out the sperm of competing males while also increasing the chances of being the one that impregnates