Brazilian Beachgoers Rescue a Pod of Wayward Dolphins

Are jellyfish taking over the oceans?

Mystery of mass dolphin deaths in Peru

Marine Marvels: Spectacular Photos of Sea Creatures

White killer whale adult spotted for first time in wild

Image Gallery: Russia's Beautiful Killer Whales

Sperm Whales Form Clans to Fight Off Orcas

Fatty Ears May Help Baleen Whales Hear

Pictures: New Suckermouth Armored Catfish Discovered

15 Incredible X-rays of Real-Life Monsters of the Deep

Scientists Take to Skies to Count Threatened Seals

Manatee Mystery: Why Can't They Avoid Speedboats?

Midway's Green Sea Turtles Dine on Jellyfish For Lunch (Photos)

2000-Pound Shark Caught Off Mexico Coast Could Be Longest Great White Spotted

Fish Glow Green After Genetic Engineering

Bright Purple Crab Discovered in Philippines

Sea Lions May Be Removed from Endangered Species List

Deepwater Horizon aftermath: how much is a dolphin worth?

7 Bioluminescent Creatures That Light Up the Ocean

Pacific Reef Sharks Vanishing Near Populated Islands

Dolphins Help Fishermen Catch Fish

Tiny sharks provide glowing clue

32 Dead Porpoises Worry Wildlife Experts

10 Bizarre and Beautiful Crabs

Asian Tiger Shrimp Found On U.S. Coast And Gulf Of Mexico, Worries Scientists

Homer Simpson And This Stargazer Fish: Are They Related?

Mother Saves Daughter From Shark Attack

This Swordfish Pierced the Skin of a Deep Sea Submarine

Whales Have Sonar "Beam" for Targeting Prey

Bottlenose dolphins: 'Gangs' run society, scientists say

NZ dolphin survival boosted by Marine Protected Area

Newly Discovered Hammerhead Shark's 'Twin' Sparks Concern

High Number of Sick Dolphins May Be Linked to Gulf Oil Spill

Ancient Beluga Whales Enjoyed Warm Waters

Rare Russian Whale Tracked to Mexico, a First for Science

The battle against a killer crustacean with an appetite for destruction

Is the U.S. Navy Accidentally Bombing Killer Whales?

Fish Has Sex on the Beach? Grunion's Quirky Mating Method Attracts a Crowd

3,000 Dolphins Found Dead on the Coast of Peru

Dolphins 'resort to rape'

What lurks beneath: plastinated veins of blue shark to feature in new exhibition

The 10 Biggest Catches In The World

In pictures: Tracking secretive octopuses

'Killer' shrimp threat on the Norfolk Broads

Rescue squads sent in to save drought-hit fish

Home is wear the art is: hermit crab moves into Lego shell

Hawaiian Monk Seals Find a Haven On Midway

The Acid Test: Armor-Covered Plankton Adapt to Warming World

New Suckermouth Armored Catfish Discovered

Can wearing magnets really repel sharks?

Bergen's Whale Hall: graveyard of giants

Japan's Whalers Catch Just 30% of Target Due to Sea Shepherd Harassment

Video: Rare species of starfish discovered

Appetite for shark fin soup 'causing decline of blue sharks in UK waters'

Caught in the Act: Ancient Armored Fish Downs Flying Reptile

In pictures: Satellite tagging tiger sharks

Shark Feeding Frenzy Captured on Video

Leatherback Turtles Wear Tracking Backpacks

Shark Feeding Frenzy Captured on Video

New Finding Offers Hope for Critically Endangered Dolphin

Crayfish Fake Out Attackers With Large, Weak Claws

The battle against a killer crustacean with an appetite for destruction

Brazilian Beachgoers Rescue a Pod of Wayward Dolphins (Video)

Sharks' Awesome, Eerie Beauty Captured in Dive Photo

Large parts of the UK are in drought and, as a result, fish are having to be rescued by the Environment Agency. How do you rescue fish?

Skegness beach dead sperm whale removed

Tongue Parasites to People of Earth: Thank You For Your Overfishing

Spiny, Venomous New Sea Snake Discovered—"Something Special"

Sawfish snout senses, swipes and stabs

Boundless Carpet of Worms Coats Bizarre Deep-Sea Vent

Eyeless Sea Creature Senses Light Like Humans

Sea Turtles Make Surprising Migration When Young

World's Second-Biggest Fish Tracked to Surprising Locale

Arctic Seas Surprisingly Alive in Winter

Dolphins' Unique Whistles Say, 'Hey! Come Play!'

Florida Manatees Face a Tough Battle Against Boats and Climate Change

Toola, Famous Sea Otter Mom, Dies: Big Pic