Fish
Fish are an incredibly diverse group of animals. Read these articles to find out about all kinds of unique and different fish.
The Biggest Catfish Ever Caught (That We Know Of)
Pacu Fish: The Piranha Cousin With Human-like Teeth
The Predatory Snakehead Fish, or 'Frankenfish,' Can 'Walk' on Dry Land
Barreleye Fish Aren't Something You Can See While Snorkeling
Deep-sea Dragonfish Use a Bioluminescent Lure to Entice Prey
The Stonefish Hides in Plain Sight and Packs a Painful Sting
The Frilled Shark Has a 3-Year Pregnancy Before Giving Birth
'Cocaine Sharks' Make Waves Off Coast of Brazil
10 Biggest Sharks in the World
Learn More / Page 3
Hammerheads have itty-bitty mouths, a tall dorsal fin and an impressively odd noggin. Why do these creatures of the deep look so strange?
The good news is, you're not likely to meet with one of these creatures on your next beach vacation. If you did, it wouldn't be a pretty sight.
By Cristen Conger & Ada Tseng
They range in size from 8 inches to 60 feet, so obviously their food preferences will differ. Sometimes what seems like a good meal, isn't, so they spit it out. That includes humans.
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Ever wonder -- as you're treading water in the ocean -- how a shark might hunt you down? They have a special sense that helps them locate prey.
The lure of a free meal is enough to get most of us moving and maybe even throwing an elbow or two as we battle for the last slice of pizza. Compared to sharks though, our feeding frenzies are tame.
Sharks have been around longer than the dinosaurs. After a few hundred million years, it's humans that might kill them off.
World-famous 'Crocodile Hunter' Steve Irwin, died on Sept. 4, 2006, in a shocking accident with a stingray. But stingray-related fatalities are almost unheard of, so what happened? Find out.
By Julia Layton
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People are so fascinated with this fierce, fast ocean predator that they've lowered themselves into steel cages to observe it up close. If you read this article though, you won't have to do that.
You think you and your siblings don't get along? Try being a shark. You might not even make it out of the womb without your brother or sister eating you.
Mellow probably isn't the first word that you think of when it comes to sharks, but these slackers of the sea could change your mind. What's their life of leisure like?
Great whites are the flashy man-eaters of the silver screen. But bull sharks may be the most dangerous, with a dinner menu that sometimes consists of sloths, dogs and cows. What can you say? They're opportunists.
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Sharks can have up to 15 rows of teeth growing behind their front row of chompers, so it's no surprise how many shark teeth litter beaches. But why do people collect them?
You don't reign supreme over the marine food chain without acute senses that can smell blood or hear injured prey from great distances. And sometimes a "sixth sense" doesn't hurt either.
Have you ever been so hungry that you could eat anything? How about a hubcap? Or maybe a suit of armor? If you said "yes," you might have something in common with the second deadliest shark.
Sharks are an intelligent and sometimes dangerous species of saltwater fish. Learn more about these often feared, often misunderstood creatures of the deep in this gallery.
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The oldest shark fossils date from more than 300 million years ago, before the dinosaurs. A few species have kept the same physical characteristics for more than 150 million years. How have they survived so well?
By Tom Harris