Frill Shark The frill shark has a large mouth with 25 rows of 300 sharp teeth, six pairs of fringed gill slits, and a long, eel-like body that can grow up to 6 feet long. It's referred to as a "living fossil" because it's a member of one of the oldest living shark species.
Goblin sharks live up to 1,300 metres below sea level. They have eel-like tails similar to frilled sharks, and grow to around 3.5 metres long. They scan the seabed with super-long snouts, detecting the tiny electrical currents given off by all living thing