17 Creepiest Creatures of the Deep Sea That Will Haunt Your Dreams

Written By Jill Taylor

The ocean’s darkest depths hide some truly strange creatures. These deep-sea species have unique ways of surviving in their extreme world. Nature gets pretty creative down there—think see-through bodies and glowing lures. Here are 17 creepy creatures that call the deep-sea home.

Giant Isopod

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This massive crustacean reminds us of a prehistoric pillbug on steroids. According to PostPods, giant isopods can grow up to 16 inches long and scavenge the ocean floor for dead animals. Their alien-like appearance, bulging eyes, and multiple legs make them look like something from a sci-fi horror movie.

Frilled Shark

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Looking like a cross between an eel and a shark, this living fossil has changed little in 80 million years. Frilled sharks have 300 needle-like teeth arranged in 25 rows, snake-like bodies, and features that seem straight from prehistoric times. They’re pretty scary-looking as they hunt in the deep.

Goblin Shark

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The goblin shark’s most obvious feature is its long, nail-like snout and extendable jaws. When it’s eating, its jaws quickly shoot forward to grab prey. This pink-skinned predator’s bizarre appearance, with beady eyes and razor-sharp teeth, makes it look like a creature from a nightmare.

Vampire Squid

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Despite its name, this cephalopod doesn’t suck blood. The vampire squid has red eyes, a dark cape-like web, and light-producing organs covering its body. When threatened, it can turn itself inside out, revealing spiky appendages. This unusual way of protecting itself makes it look even stranger.

Anglerfish

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Female anglerfish have a glowing lure that dangles in front of their large, fang-filled mouths. Combined with nearly transparent skin and oversized heads, these deep-sea predators look pretty strange. The males also have a very unusual lifestyle – they permanently attach to females, essentially becoming just sperm-producing organs.

Giant Spider Crab

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With a leg span reaching up to 12 feet, the Japanese spider crab is the largest arthropod on Earth. Its spindly legs and armored body make it intimidating on the ocean floor. These massive crustaceans can live for up to 100 years and grow more monstrous with age.

Barreleye Fish

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The barreleye fish, also called the spook fish, has a see-through head filled with fluid. Its unusual eyes are shaped like tubes and can turn upward to spot food above them. With its ghost-like look and odd features, the barreleye is one of the weirdest animals in the deep ocean.

Viperfish

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The viperfish has huge, fang-like teeth that are too big to fit in its mouth and can open its lower jaw very wide, allowing it to eat surprisingly large prey. Along its body are organs that produce light, making the viperfish glow eerily in the ocean’s dark depths.

Coffinfish

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The coffinfish is an anglerfish living on the ocean floor with a jelly-like body that can puff up like a balloon. Its name comes from its long shape and pale color, making it look a bit like a coffin. This fish can quickly change its size, and combined with its spooky look, it’s one of the creepier animals in the deep sea.

Fangtooth

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The fangtooth fish has the biggest teeth compared to the body size of any fish – its teeth are so large that it can’t completely close its mouth. This fish is deep black in color and has a scary-looking grin, making it look like a tiny monster as it hunts in the middle layers of the ocean.

Giant Squid

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The giant squid, which has been part of sailors’ stories for ages, can grow up to 43 feet long. It has the biggest eyes of any animal, able to see even the dimmest light in the deep ocean. This huge squid is rarely seen, and its enormous size has scared people for hundreds of years.

Gulper Eel

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Also known as the pelican eel, the gulper eel has a massive mouth attached to an eel-like body. It can unhinge its jaw to swallow prey larger than itself. Its tiny eyes and bioluminescent tail tip add to its unsettling appearance in the deep ocean.

Bobbit Worm

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This predatory worm can grow up to 10 feet long and hides in burrows on the ocean floor. The Bobbit worm strikes with lightning speed, using powerful jaws to drag prey into its lair. Its alien-like appearance and ambush-hunting style make it a terrifying deep-sea predator.

Chimaera

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Chimaeras, also known as ghost sharks, have cartilage-based skeletons like sharks and rays. They look ghostly with their wing-like fins and long, whip-like tails. These strange, ancient deep-sea creatures have poisonous spines and unusual sexual organs that can be tucked away. Their odd features make them seem like something from another world.

Sarcastic Fringehead

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Despite its comical name, the sarcastic fringehead is an aggressive predator with a terrifying defense mechanism. It opens its mouth to reveal an enormous, colorful skin flap when threatened. This startling display, coupled with its eel-like body, creates a nightmarish vision on the seafloor.

Hatchetfish

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Hatchetfish get their name from their unique body shape. They have big eyes that face upward and organs on their bellies that can produce light. These features help them live in the middle depths of the ocean. Their bodies are silvery and somewhat see-through, and they always look surprised.

Zombie Worm

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Zombie worms, also called Osedax, eat the bones of dead whales on the ocean floor. These strange creatures don’t have mouths, eyes, or stomachs. Instead, they use root-like parts to drill into bones and soak up food. Their creepy eating habits and weird looks make them seem like something from a nightmare in the deep sea.

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