Sometimes referred to as "mermaid’s purses", the egg cases then attach to features such as rocks or algae, allowing the shark embryo inside to grow and later hatch from the egg.
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Secrets of Hammerhead Sharks Revealed in 'Very Rare' ImagesSecrets of the hammerhead shark have been revealed in images studied by scientists, who are now one step closer to discovering how the species got its unique appearance. University of Florida ...
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