 The egg cases measure around in length, with a pair of thin flanges spiraling 6–7 times around the outside and two slender tendrils up to long at one end, used to attach the capsule to seaweed or sponges.The capsules are usually deposited at a depth of , much deeper than the Port Jackson shark, though there is a single record of an egg being found only down.The time to hatching has been variously reported as 5 and 8–9 months; the newly emerged young measure long and resemble the adults.