 These discrepancies in maturation size may be a result of regional variation or incidental selection from heavy fishing pressure.The growth rate for milk sharks off Chennai have been calculated as in the first year, in the second year, in the third year, in the fourth year, in the fifth year, and per year from then on.The age at maturation is thought to be 2–3 years, and the maximum lifespan is at least 8 years.