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, or even if ...

Freshwater habitats face a multitude of threats ... The ecosystems are home to more than 40 percent of the world's fish species. Despite their value and importance, many lakes, rivers, and ...

WWF works to sustain the natural world for the benefit of people and wildlife, collaborating with partners from local to global levels in nearly 100 countries.

Habitat destruction and overfishing have drastically ... Beluga sturgeon is historically the largest freshwater fish on Earth. This sturgeon once grew over 23 feet and weighed thousands of pounds ...

A tiny, scaleless, freshwater fish, the highly endangered unarmored threespine ... the court went against the stickleback in the case, holding that critical habitat for the fish was discretionary, not ...

FLAGSTAFF, AZ (AZFamily) — A first-of-its-kind study has an alarming conclusion: a quarter of all freshwater fish species could ... natural flow of rivers, and habitat loss are some of the ...

an indication of the degrading quality and quantity of freshwater habitats throughout the state. Several dozen freshwater fish species in California are now formally listed as threatened or endangered ...

Arend, K. K. et al. Seasonal and interannual effects of hypoxia on fish habitat quality in central Lake Erie. Freshwater Biology 56, 366-383 (2011). Benndorf, J. Conditions for effective ...