Fish have filled Earth's oceans, lakes and rivers for half a billion years, and while we know much about our aquatic friends, like the saying goes, there are plenty more fish in the sea to learn about.
Live Science brings you the latest discoveries about fish, from the fossils of giant ancient fish that likely preyed on humans' ancestors to the living unicorn-like blind fish dwelling deep in Chinese caves. We dive into facts about iconic aquatic animals like great white sharks, the world's largest predatory fish, and if you just want to stare at photos of the freakiest-looking fish, we’ve got you covered there too. Our expert writers and editors are here to serve all your aquatic curiosities with the latest fish news, features and articles.
Discover more about fish
Latest about Fish
Shark Week team discovers unusual 'black makos' off California coast
Weird makos filmed off the California coast in a new Shark Week show raise questions about what these sharks actually are.
How to watch Shark Week 2025: Live TV & streaming schedule for Discovery special
All the broadcast information, including full program guide and show synopses, so you can watch Shark Week 2025 from anywhere from July 20-26.
Why do sharks freeze when flipped upside down?
Many shark species are temporarily paralyzed when turned upside down. But what benefit does this trait have?
Pacific spiny lumpsucker: The adorable little fish with a weird suction cup resembling human teeth
Pacific spiny lumpsuckers are wee, coastal fish that look a bit like concerned strawberries, have a fluorescent glow and pack some serious body armor.
Pelican eel: The midnight zone 'gulper' with a giant mouth to swallow animals bigger than itself
Open wide! The gaping gob of a pelican eel can expand into a voluminous sac for trapping elusive prey in the dark ocean depths.
Do sharks make noises? An accidental discovery might just answer that question
Scientists noticed the clicking sound after handling the rig sharks during routine behavioral experiments.
The Mariana Trench is home to some weird deep sea fish, and they all have the same, unique mutations
Deep-sea fish adapt to some of the most extreme conditions on Earth. New research analyzing their evolution finds the same mutation across fish species that have evolved on separate timelines — alongside human-made pollutants contaminating the deep sea.
Scientists capture footage of bizarre deep-sea creature with parasite pig tails
Scientists on an expedition to the South Sandwich Islands near Antarctica have recorded horrifying videos of parasitic copepods feasting on the head of a deep sea rattail fish.
