Nurse shark
The mating season occurs once every 18 months, and lasts from the end of June till the end of July. They are ovoviviparous, with the gestation period lasting 6 months. Females can give birth to 21-29 pups at a time. However, sometimes the larger pups will feed on the smaller pups. As a result, only a small number of pups from each litter will live to the age of maturity. The young are born with spots, which fade as the sharks grow older. The average lifespan in the wild for these sharks is from 25 to 30 years.