It pulsed like a tiny heartbeat — a clear, quarter-sized jellyfish rising through the calm water of Taft Lake, sunlight flickering through its translucent body. The sight stopped Kate Lucas ...

Minnesota DNR says there are only a handful of verified sightings of this rare species of freshwater jellyfish in Minnesota.

Drawing on satellite measurements and global economic data, a new report from the World Bank finds that Earth is losing ...

This video explores five colossal freshwater fish that reach sizes most people never imagine. Viewers learn how these species ...

Saltwater and freshwater fish tanks are enjoyable to have around the home. But is one better for beginner tank owners than the other?

A handful of nations control the biggest shares of global freshwater, led by Brazil, Russia, Canada, the US, and China, ...

These mysterious creatures undertake extraordinary journeys—a metamorphosis and migration so dramatic it rivals any in nature ...

Cardinal tetras are famous for their glowing blue and bright red stripes that run across their bodies. People often mix them up with neon tetras, but cardinal tetras have a bright red line that goes ...

A new report on the conservation status of New Zealand's freshwater fish is the most comprehensive yet, sharpening focus on ...