5) Gulper Eel
With most of its mass belonging to its huge mouth, it’s no wonder that this creature, the eurypharynx pelecanoides, has been given the nickname “gulper eel.” Like snakes, the eel can unhinge its jaw and swallow animals much larger than itself. While the eel may not look like much, once it has swallowed a meal, it digests it while its victim moves slowly through its highly stretchable stomach. Larger than many of its deep-sea counterparts, the gulper eel can reach lengths of two to six feet and lives in waters ranging from 3,000 to 6,000 feet.
6) Giant Squid
Hardly needing an introduction, this creature has inhabited sea-lore for centuries. Reported to have pulled entire sailing ships underwater and to have eaten shipwrecked sailors in World War II, these creatures remain largely a mystery. Dubbed the architeuthis dux by scientists, the giant squid is one of the largest known animals in the world, reaching lengths of up to 60 feet (as far as scientists can guess). Because none of these creatures have ever been seen alive, scientists can only guess how large these creatures get and how they live in their underwater environments. What we know about these creatures comes from corpses that have washed up on beaches or been snagged in fishermen’s nets. A carnivore, this huge creature is one of the ocean’s apex predators, using its powerful tentacles and razor-sharp beak to devour its prey. Even gigantic sperm whales that eat giant squid often have scars from their battles to subdue this mighty predator.