On average, the males were able to mate 19 times per day. The team was most interested in the amount and quality of the sperm after each of these matings. During the first three matings, the fish ...

Whatever the reason, breaching is very important to the fish: It takes up to 32 times more energy than swimming. Usually solitary, males and females come together to mate during the summer.

We did our study on male fish – sexual selection is usually stronger on males than females, because in most species there are more males seeking mates than females ready to mate and breed.