Sphyrna
Members of this group are mainly viviparous, but in 2007, a bonnethead was found to be capable of asexual reproduction. They give birth to around 12-40 young at a time. Once they are born, young ones come together in groups, and swim towards warmer waters. They then stay together in groups until they are older and big enough to live on their own. They live for around 20–30 years.