
Megalodon
HighThe largest shark that ever lived went extinct 3.6 million years ago, unless the deep ocean is hiding something.
15 creatures found in ocean habitats.

The largest shark that ever lived went extinct 3.6 million years ago, unless the deep ocean is hiding something.

The ship-swallowing sea beast of Norse legend, now partially explained by giant squid.

A skinless horse-rider hybrid rises from the ocean around Orkney, and its breath alone can wilt crops and sicken entire islands.

This shape-shifting water horse of Scottish lochs lures riders onto its back, then drags them to a watery death.

A ghostly white humanoid shape rising from Antarctic waters, seen by Japanese fishermen.

Hundreds of witnesses watched a giant serpent patrol Gloucester Harbor for weeks in 1817.

A humped sea serpent has been spotted off the coast of Cornwall since the 1900s, sometimes close enough to shore that beachgoers scatter.

A colossal red octopus lurking in Funka Bay, revered by the Ainu as both healer and destroyer.

A horse-headed sea serpent weaving through the waters of the Pacific Northwest.

Sacred water guardians of Maori tradition that shape rivers, protect tribes, and sometimes drag the unwary to their doom.

Hunted to extinction just 27 years after Western science discovered it, some believe pockets of this gentle giant survive in remote Arctic waters.

A massive white carcass with an elephant-like trunk that washed ashore in South Africa.

Massive, fleshy, unidentifiable masses that wash ashore worldwide, defying easy explanation until the lab results come in.

A segmented, armored sea creature with dozens of lateral fins, washed ashore in Vietnam in 1883.

A marine humanoid reported by fishermen in New Ireland, with a woman's upper body and a fish-like lower half.