Reef fish send out a scarlet luminescence that may allow them to communicate with other fish, scientists found.

The yellow-nosed reptile, discovered in the central Fiji Islands, is named after the Fijian word for "hello."

After traveling thousands of miles, Magellanic penguins have begun arriving on the shores of Argentina for their annual mating rituals.

In Kenya researchers are using satellite technology to track the rare green turtle's migratory patterns in an attempt to save the species.

Identified by DNA evidence, the newly named fish increase Australia's known shark and ray species by a third.

Horses fight, Hurricane Ike stirs up a storm of memories, Baghdad turns red, painted soldiers celebrate, and more in the week's best news photos.

Light-emitting jellies, green shrimp, and other oddities are among the animals found by an Australian expedition that netted hundreds of new species.

A recent survey has found scores of previously unknown marine animals in popular dive areas. "People have been swimming past these big, showy animals for years," said one marine scientist.

Light-emitting comb jellies, squat lobsters, and shrimp that can kill with sound are among hundreds of new species discovered along reefs off Australia.

Scientists discover a tiny "ant from Mars" in the Amazon, a one-horned rhino is recaptured, and more in our weekly update of animal photos.

Fallow deer bucks with the deepest groans are most popular with does, a new study shows.

Improved planning for pet owners helped some animals weather the storm, but uncounted others with their stranded owners may still need rescue, disaster response teams say.

A total crackdown on the trade of wild animals for food could prove disastrous for people in Central Africa, who have few alternative sources of protein and income, experts say. Warning: graphic imagery

A camp for working elephants helps preserve the mahout way of life in Thailand—and helps the beasts get back to nature.

An ant with no eyes and a pale body is so different from other known ants that it earned an extraterrestrial name, say biologists who found the new species.