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Tag archives for freshwater species of the week

Mexico’s Blind Cave Fish: Freshwater Species of the Week

If you don’t use it, you lose it—at least this appears to be the case for a blind cave fish found in Mexico and the southern U.S. known as Astyanax mexicanus. Descended from an eyed surface fish, over long periods of time the subterranean form of the same species has adapted to darkness, accumulating new…

Salmon Trucked to Ocean? Freshwater Species of the Week

The annual fall run of young salmon from their inland birthplaces in rivers to the sea is one of Nature’s dramatic migrations. But this year, a number of chinook salmon may make that journey by truck. This week, state and federal wildlife officials in northern California announced that they will ferry hatchery-raised salmon to the…

Volunteers Needed to Study American Eels

This week, a trio of organizations have asked the public to help gather data on one of New York City’s more slippery residents: the American eel (Anguilla rostrata). (We previously profiled the American eel as a Freshwater Species of the Week in August 2012.) Wildlife Conservation Society’s New York Aquarium, the New York State Department…

The Mexican “Water Monster” Resurfaces: Freshwater Species of the Week

Feared extinct, another axolotl has been found in Mexico City—but will the amphibian hang on?

Weird Purple Frog Seduces Females From Underground

Males calls to females from beneath a thin layer of soil—the only frog known to have such an odd behavior, a new study says.

Thousands of Baby Turtles Hatch in Brazil: Freshwater Species of the Week

This week, scientists in Brazil weren’t kidding when they said that they “hit the mother lode.” They were referring to a mass hatching of an estimated 210,000 giant South American river turtles at the Abufari Biological Reserve. It’s one of the largest known hatchings for the species, Podocnemis expansa. Researchers from the Wildlife Conservation Society…

Beware in the Bayou: Alligators and Crocodiles Can Climb

You might think of crocodiles lurking in the water or perhaps sunning themselves on a riverbank, but it turns out these toothy reptiles’ domain extends to the upper branches of trees.

Leapin’ Lizards! Crocodiles Can Climb Trees

New research shows crocodiles frequently make their way up trees to bask in the sun and keep an eye on their environment. You might think of crocodiles as being at home in the water — but it turns out these toothy reptiles are also quite comfortable scaling trees. A new study  documents the surprisingly common…

Extinct “Devil Frog” Sported Spikes, Body Armor

Sporting elaborate spikes and body armor, the extinct amphibian was even more terrifying than previously thought, a new study says.

First Fish That’s No Longer Endangered: Freshwater Species of the Week

This week, for the first time, a fish has been declared recovered under the U.S. Endangered Species Act. The U.S. Fish and Wildlife Service proposed this week that the Oregon chub (Oregonichthys crameri) “has recovered and no longer meets the definition of an endangered species or a threatened species under the Endangered Species Act of 1973.” The silvery…

New Big-Head Fish: Freshwater Species of the Week

This week, scientists identified a new species of freshwater fish in the U.S., the cedar sculpin (Cottus schitsuumsh). Forest Service fisheries biologist Michael Young said in a statement, “It’s really exciting to find a new species of fish. It’s something you might expect in more remote parts of the world, but not in the U.S.” Scientists…

New Species of River Dolphin: Freshwater Species of the Week

Scientists in Brazil proposed a new species of river dolphin this week, the first such designation for the highly endangered group in a century. The proposed new species of river dolphin, the Araguaian boto (Inia araguaiaensis), was found in the Araguaia River Basin in central Brazil. The marine mammals were found to be isolated from other…

Bird-Snatching Tigerfish: Freshwater Species of the Week

Earlier this week we reported on the first confirmed video that shows what many people had long feared: that some fish can leap out of the water and snatch birds in midair. That fish is the tigerfish, a “megafish” that dwells in lakes in Africa, and which has large, razor-sharp teeth. Widely distributed across much…

Bizarre Mystery Fish Identified: Species of the Week

Earlier this week, an angler in Borneo caught an unusual-looking fish, which caused quite a stir online. Reported the Borneo Post: The mystery fish has a large head and is covered with sharp spines on the top and bottom of its body. Its body gets progressively smaller towards the tail. The fish measuring over one…

Repurposed Private Parts: 5 Unexpected Ways Animals Use Their Genitals

From “sword” fights to singing to sonar jamming, here are five of the more unusual ways animals employ their genitals.