Long ago, some saltwater fish adapted to freshwater — and in doing so, developed an extraordinary sense of hearing rivaling our own. By examining a 67-million-year-old fossil, researchers from UC ...

Researchers in Alberta uncovered a fossil fish that rewrites the evolutionary history of otophysans, which today dominate freshwater ecosystems. The new species, Acronichthys maccognoi, shows early ...

A tiny fossil fish from Alberta is forcing scientists to rethink a story that has sat quietly in textbooks for decades. It is ...

Climate change is rapidly altering freshwater ecosystems — raising temperatures, altering flood pulses and oxygen levels — and driving complex, region-specific changes in how fish grow, migrate and ...

A new global study reveals an average 81% decline in migratory freshwater fish populations between 1970 and 2020. Habitat loss, degradation and overfishing are the main threats to migratory fish, ...

Scientists are working to protect a relict fish found in only one far north Queensland river catchment. The Bloomfield River cod is the only tropical freshwater cod in the world and may have been ...