To reach the animals, researchers broke open the rocks “with a hammer and pickaxe.” Take a look at what they found.

Metaphase plates of Arapaima gigas from Mamirauá (MAM) population (Amazon River basin) hybridized with repetitive DNA sequences, including mono-, di- and trinucleotide microsatellites and the ...

A colossal freshwater fish that can reach up to 10 feet in length has mysteriously washed up on a shoreline in Florida. The arapaima is a predatory fish native to the Amazon, but one was found ...

Smaller fish species are more nutritious, lower in mercury and less susceptible to overfishing, a Cornell-led research team has found. The team's study was conducted in the Amazon River, but the ...

Unprecedented Fish Die-Off in Amazon River Floodplain Shocks Pará Communities Riverside residents witness the death of 15 to 20 tons of various species, including alligators and turtles, amid ...

Ten Fascinating Facts About the Arapaima, the Largest Freshwater Fish in South America This keystone species of the Amazon River ecosystem are a fearsome predator with many names.

This is the shocking moment a giant arapaima fish leapt from a tank and startled a feeder. The woman held a small fish above the aquarium, where two huge fish with armor-like scales waited for her ...

LETICIA, Colombia — Marciano Flores stood knee-deep in the Amazon River with the rest of his crew, ready to haul in a giant net as a man in a canoe circled in an attempt to drive fish their way ...

As a punishing drought dries up stretches of the Amazon River, Brazil is resorting to dredging to try to keep food, medicine and people flowing along the watery superhighway.

A gigantic fish measuring 6 feet long and weighing 220 pounds has been caught in the Hudson River in New York during an environmental survey, officials said.

A new fish species with a mark that resembles "The Eye of Sauron" from "The Lord of the Rings" has been named by researchers in the Amazon after a genetic analysis.