While the majority of sharks give birth to live young, a number of species are oviparous, meaning they lay eggs. The eggs are laid in protective cases called mermaids’ purses. When sharks at the aquarium lay eggs, our keepers check on their development using a technique called candling, where they shine a bright light through the egg to monitor the embryo’s development. The egg cases shown in the video are chain catsharks and they were approximately four months into their eight and a half month
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Shark egg - Yes, sharks do lay eggs. Some of them, anyway. About 70 percent of sharks are viviparous, meaning they give birth to live young; the remaining 30 percent of shark species — plus near-relatives like skates, rays and chimaeras (an order that includes the spooky "ghost shark") — are oviparous, meaning they lay eggs externally. Each shark egg contains an embryo (baby shark) and a yolk sac (baby's first meal), much like a chicken's egg. Look closely at the video, and you can even see the
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