Saltwater Fish

Saltwater fish are the most beautiful fish in the world. They range from the majestic marlin to the funny-looking flounder, and the goliath grouper to the tiny blenny, and just about everything in between.


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6 Facts About the Lovely, Incredibly Destructive, Lionfish

The showy lionfish is a stunning beauty. But this invasive species, which was released into the wild in the 1980s, is wreaking havoc on delicate reef ecosystems worldwide.

The Deep-ocean Anglerfish Catches Prey With the Lure on Its Head

Most species of the rarely seen anglerfish live up to a mile beneath the ocean, where the females lure prey with a head-dangling hook appendage and permanently fuse with male suitors. It doesn't get much stranger than that.

Swordfish Are the Natural-born Gladiators of the Sea

The swordfish's nose might look crazy weird, but these gladiators of the sea are perfectly outfitted for ocean battle.

Humuhumunukunukuapua'a: A Long Name for a Little Fish

Humuhumunukunukuapua'a, the colorful little fish with the craaaaazy long name, is Hawaii's state fish, but it wasn't always.

Dive Inside the Weird World of the Ocean Sunfish

It's one of the gentle giants of the sea. It loves sunbathing, dining on crabs and taking deep dives to the ocean floor.

Blobfish: World's Ugliest Animal or Someone's Grandpa?

The blobfish is actually pretty average looking in its normal habitat.

One Fish, Two Fish, Red Fish, Smart Blue Fish

The cleaner wrasse fish passed the mirror test, which is considered the gold standard for determining self-awareness.

Researchers Stunned by Gorgeous New Fish Find

Scientific divers from the California Academy of Sciences discover new species of dazzling, neon-colored fish.

Cuttlefish, Masters of Camouflage, Have Newly Discovered Super Power

Cuttlefish can avoid detection by holding a disguise for long periods of time.

Who Knew Fish Sex Could Be So Loud?

The Gulf corvina is the loudest fish on the planet, helping lead to its overfishing and endangerment.

Catfish Are Chowing Down on Mice and Pigeons

Scientists have discovered a few enterprising catfish that are having a fancy feast — of mice.

Could the Popularity of 'Finding Dory' Hurt the Blue Tang Fish?

Could the sequel to Disney's 'Finding Nemo' increase demand for pet s and bring the decline of the exotic fish that plays the leading role?

How Giant Oarfish Work

King of the herrings! What regal creature would have such a majestic history? It's the giant oarfish, and it's surfaced everywhere from sailors' nightmares to Southern Cali. Meet the longest bony fish ever!

Barracuda Facts, Pictures, Video

With its flexible, slim body, the barracuda is particularly adapted to swimming among coral reefs, which requires intricate moves through tight turns. Meet the barracuda! View pictures, watch video, read facts, explore interactives and more.

Eel Facts, Pictures, Video

Unlike land snakes, eels are usually scaleless is although a few species can be found with tiny scales along their bodies. Meet the eel! View pictures, watch video, read facts, explore interactives and more.

"Shark Week" at Discovery Headquarters: Chompie Image Gallery

For the city of Silver Spring, Md., "Shark Week" doesn't stop when the TV is off. Every year, a great white shark affectionately known as Chompie takes up residence on Discovery Communications' headquarters.

Will I get sick if I eat barracuda?

Oooooh, barracuda! It's not just a Heart song -- it's also a dinner dish. But should you be as suspicious of this creature on your plate as scuba divers are of encountering it in the water?

Flying Fish

A flying fish is a fish with large fins that help it to glide through the air. Most flying fish live in tropical and subtropical areas of the ocean.

How do stingrays kill?

World-famous "Crocodile Hunter" Steve Irwin, died on Monday, September 5, in a shocking accident with a stingray. But Stingray-related fatalities are almost unheard of, so what happened? Find out.