Because of this, the Monterey Bay Aquarium does not buy or serve shark meat. Unlike most fishes, sharks have internal fertilization. The majority of sharks give birth to live young, but some species lay eggs in leathery cases. Sharks that give birth to live young include the leopard shark, blue shark and great white. Egg-laying sharks include the catshark, the swell and horn sharks, and the largest fish of all, the whale shark.
Baby sharks grow in their egg cases, nourished by yolk for several months before hatching.