Arapaima are the largest freshwater fish in South America—and a keystone species in the Amazon River ecosystem.

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked in mystery. No one is sure how many giant stingrays are left, which habitats they prefer ...

It’s an extraordinary fact: 51% of all known species of fish live in freshwater - 18,075 species. And more are being discovered all the time. But few people have any idea of the unimaginable diversity ...

ALSO READ: Unveiling five fascinating facts about fish pets Maintaining a freshwater aquarium tends to be more straightforward and cost-effective. These fish often require less specialized equipment ...

Researchers investigated the population characteristics of two hybrid crucian carp strains based on one nuclear gene ...

In honor of Veterans Day, the Rhode Island Department of Environmental Management (DEM) will be stocking several thousand rainbow and brook trout in select bodies of water across the state this week.

Do fish get thirsty? Such and similar questions are difficult to answer. Read on to learn more fascinating facts about fish ...

A report has warned of a "catastrophic" decline in freshwater fish, with nearly a third threatened by extinction. Conservation groups said 80 species were known to have gone extinct, 16 in the ...

Fish can accumulate high levels of per- and polyfluoroalkyl substances (PFAS), even far from sources of contamination, ...

Research expeditions conducted by Fauna & Flora and our partners in Kyrgyzstan have revealed a previously common freshwater ...

The "Mekong ghost" has resurfaced. After nearly two decades without a trace, the elusive giant salmon carp (Aaptosyax grypus) ...