Chimaeras, or ghost sharks, have been around for millions of years. However, the elusive fish, which live at depths of up to 6,000 feet, are largely unknown to science. The lack of crucial information — like how long they live or how often they reproduce — makes it challenging to monitor and protect the 52 known ghost shark species. Now, a rare newborn chimaera, discovered off the coast of New Zealand, may help scientists better understand the mysterious deep-water creatures.