This bizarre-looking fish may seem otherworldly, but every part of its design solves a real problem: how to see, hunt and ...

It’s no wonder deep-sea creatures are so strange. They survive against the odds in one of the most extreme environments on the planet, featuring near-zero temperatures, desperately low oxygen levels, ...

Far below the ocean’s surface, light barely exists. Sunlight fades quickly, and what little brightness remains often comes from animals themselves — tiny flashes, glows, and pulses used to hunt or ...

A new study offers the first direct evidence that deep-dwelling mesopelagic fish, which account for up to 94% of global fish biomass, excrete carbonate minerals at rates comparable to shallow-water ...

These three fish are freaks, phantoms and mysteries of the deep. Here’s what we’ve learned from the rare glimpses we’ve had of their lives. The deep sea is one of Earth’s final frontiers. Given its ...

An oarfish -- a super rare fish commonly referred to as the "doomsday fish" -- recently washed ashore on a beach in Mexico, leaving beachgoers stunned. The fish typically surface when they are dead, ...

An oarfish — a super rare fish commonly referred to as the “doomsday fish” — recently washed ashore on a beach in Mexico, leaving beachgoers stunned. The fish typically surface when they are dead, ...