The Strange Life of Creatures Whose Sperm Is Larger Than They Are Some insects and sea creatures produce sperm that is up to 10 times bigger than they are. Now scientists have used an innovative new x-ray technology to show how this bizarre situation evolved over hundreds of millions of years.

It sounds like a genetic aberration, but supergiant sperm can actually be an evolutionary advantage in several species. Fruit flies are a just a few millimeters long, but their sperm are 6 cm long. To top that, a human male would have to shoot out sperm that are up to 60 meters long. Another super giant sperm producer is a type of ostracod, a sea crustacean that looks like a tiny snail less than a centimeter long. Its sperm grows up to 10 times longer than its body.