What animal has the longest gestation period? From salamanders to elephants, here’s how long it can take to make a baby.

The frilled shark is not currently classified as endangered by the International Union for Conservation of Nature (IUCN), but increased deep-sea fishing activities raise concerns about accidental ...

These rare deep-sea fish dwell 200 to 2,000 meters deep. The frilled shark, a rare deep-sea “living fossil,” resembles an eel and was spotted in 2007 near Japan's surface, possibly due to ...