The barreleye fish (Macropinna microstoma) is known for its strange eyes and transparent dome for a head head — features that make it look more like a creature from science fiction than reality.

The deep-sea dragonfish is one of the most mysterious and fearsome creatures lurking in the ocean's depths. Known as a top predator in the deep sea, this fish has evolved incredible adaptations to ...

To move, this species uses two fins—one pectoral and one dorsal—that are so thin they are almost transparent. As with sea horses, sea dragon males are responsible for childbearing. But instead ...

From deadly 'living fossils' to glowing sea angels, the ocean floor is home to creatures almost alien to us. Here are five incredible creatures straight from the deep.

Weedy sea dragons have very long, thin snouts; slender trunks covered in bony rings; and thin tails which, unlike their seahorse cousins, cannot be used for gripping. They have small, transparent ...