Reproduction of the cookie-cutter shark is accomplished through internal fertilization. The male has instead two 'claspers' (pterygopodes), located on his underside in the rear. Fertilization is accomplished by his insertion of one of his claspers into the female's cloaca. Like other small sharks, this shark is oviparous, and the female coats her eggs in a horny casing before attaching them to rocks and seaweed. Hatching can take place after 12 to 22 months. When the young emerge, they are fully developed and capable of hunting for themselves. Males mature at approximately 14 inches and grow to a size of 16 inches, while females mature at 16 inches and reach up to 20 inches (Stoakely 1997).