Nighttime underwater photos show fish hanging out with jellyfish and anemones — perhaps seeking their protection.

In the dark waters off Florida and Tahiti, young fish no bigger than a thumb drift through the open sea holding stinging ...

In what may be the world's first-ever recorded sighting, a black seadevil — anglerfish known for living thousands of feet beneath the ocean's surface where the light no longer touches — was caught on ...

A curious, colossal, cow-sized sunfish circled an Oregon boat and rose to be touched. Roughly 7 feet, 1,000+ lbs. Watch the video.

Obsessed with fish? From the regular to the extraordinary, the common to the rare, we love seeing fish swim in the ocean. It’s like a burst of serotonin every time! Imagine how much better our social ...

Species across the planet are on the move. Climate change has already caused more than 12,000 species to shift their homes across land, freshwater and the sea. They move to escape unfavorable ...

With each flick of its fins, it leaves behind a glowing neon trail that feels like an artist sketching light across the water. The whole sight is oddly fascinating, as if nature decided to collaborate ...