<p><br> According to the U.S. Environmental Protection Agency, about 40 percent of American freshwater fish and amphibian species, including this red-sided dace, are classified as being at risk.</p>

Red-Sided Dace


According to the U.S. Environmental Protection Agency, about 40 percent of American freshwater fish and amphibian species, including this red-sided dace, are classified as being at risk.

Photograph by George Grall

Freshwater Plants and Animals

Get acquainted with some of the plants and animals that call freshwater home.

Read This Next

Is your favorite ‘green’ product really eco-friendly?
Why Noah’s Ark will never be found
The 10 best compact cameras, according to Nat Geo

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet