Scary aquatic monsters specialize in 'drilling' shark meat from within

An eel-shaped fish has existed on Earth for more than 300 million years before dinosaurs had strange feeding habits that terrified sharks and whales.

The fish is called Eptatretus of Hagfish, the only living animal known to have a skull but no spine.

This species has a strange way of eating prey, they drill a deep hole through the prey flesh. Hagfish's predators are usually much larger species like sharks, whales and birds.

Thanks to the slow metabolic body, Hagfish can fast for months. Hagfish is often found in cold waters around the world, and there are now a total of 76 Hagfish species found.

The terrifying sharp teeth of Hagfish fish.

When attacked by an enemy, the fish secrete a viscous mucus that makes them slippery.

The video recorded images of eel-like creatures with sharp teeth at Tirúa, Chile.

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