Fish have fangs so long that they cannot close their mouths

The viper fish is one of the sea monsters with the most terrifying appearance on the ocean floor. The fish has features such as a large mouth with giant hooked, extremely sharp teeth.

The whole body of the viper fish is black with some parts glowing to hunt prey. In particular, it has a long and glowing dorsal fin that acts as a lure.

Sloane viper fish.

Research shows that the Sloane viper fish (Chauliodus sloani) has fangs so large that it cannot close its mouth. Because if they do, they will pierce their own brains.

The Sloane viper fish has large, transparent teeth and a strip of light-emitting organs called photophores along its abdomen. These are the characteristics that help it survive in the deep sea (Photo: Getty).

These razor-sharp teeth also have strange colors, when completely transparent. This helps them hide their "weapons", making it impossible for their prey to notice before it's too late.

In addition to the viper fish, some deep-sea predators have a secret weapon that makes them "magnets" for hunting. That's bioluminescence — or the ability to form a light source.

The most famous of these is the "fishing rod fish " - of more than 200 different orders - which have the ability to lure prey by using a glow-in-the-dark light on the rod-like part attached to their head. .

This light attracts smaller sea creatures to where food sources are limited. While the poor prey thought they were about to devour a tiny luminescent creature, in reality they were about to become a meal for the fearsome predator.