After many years of careful searching, researchers have pinned down the identity of a new species of shark. Meet the demon shark.
) discovered two more ridged eggs and continued the search to pin down the species that had made such unusual artifacts.
Many of the eggs had come from a depth of 410 to 504 meters off the northwest shelf of Australia, so the researchers searched the country’s fish databases for specimens recovered at the same depth. They eventually hit upon an 18-inch female catshark that they later learned was pregnant with the telltale ridged egg., which includes such members as the hoary catshark, the flaccid catshark, the humpback catshark and the milk-eye catshark.
But why such extreme ridges? They likely protect the developing sharks from predators and other sea life, the paper says, during the long process that turns them into young sharks. In general, catshark eggs are made of tough keratin-like collagen, yet they still allow for sea water to flow into the interior.that’s sharply attuned to its environment with excellent senses of taste, hearing and smell.
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