A new study reveals that these fish fluoresce more in deep water, a technique that allows them to convert blue-green light into red or yellow light.
The school of fish measured about 50 feet wide and 325 feet long, and could have contained anywhere from 1 million to 100 million fish.
Study of stickleback fish finds they recognize each other if they have been housed together.
Ferocious-looking sand tiger sharks appear to respect, and are even curious about, scuba divers who respect them.
Is anything ever drab under the sea? Fish don't ever seem to dress down -- they're as colorful as possible, always decked out. That, of course, makes us wonder why.
'Big Mouth Blunt Tooth,' a newly discovered fish, is challenging views on what life was like millions of years before dinosaurs existed.
Visitors to Jennette's Pier in Nags Head, North Carolina, were shocked last week when an evil-looking fanged fish washed up alive on the shore.
Does a group of sober zebrafish encourage one drunk fish to swim really fast?
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