The Barreleye fish’s see-through head is a rare and incredible feature, giving it an almost otherworldly appearance. It can ...

The Mariana Trench is the deepest place on Earth, and we're still in the dark about much of the life that calls it home. Here are just a few of the trench's eye-popping residents.

The barreleye is a small deep-sea fish, measuring about 6 inches (15 cm) long. Advertisement Its most striking feature is its transparent head, which allows you to see the fish's internal ...

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 ...

A quarter of freshwater animals, including fish, insects and crustaceans, are at high risk of extinction due to threats including pollution, dams and farming, according to a new study published on ...