You’re looking at a sight rarely seen, a 5-foot (1.5-meter) frilled shark, a living specimen of an ancient species once thought extinct. Most sharks live more or less as their ancestors did 200 million years ago, long before T-rex began his reign of terror on land. Still, seeing a frilled shark is special. They’re one of the few surviving species from one of the oldest shark orders, and so unique that scientists give them an order of their own.