The Murray cod, named Arnie after Australia's recently retired Olympic champion Ariarne Titmus, was first tagged in 2022.

New research finds that ocean-dwelling fish entered freshwater environments on several occasions, evolving enhanced hearing abilities in the process. When ancient marine fish transitioned from ...

All hail the GloFish: The heir to the Day-Glo poster, the strobe light and the lava lamp and, if a Texas company has its way, the first genetically engineered household pet. Transgenic zebrafish, ...

Long ago, some saltwater fish adapted to freshwater — and in doing so, developed an extraordinary sense of hearing rivaling ...

Thousands of fish species are facing "catastrophic" decline — threatening the health, food security and livelihoods of hundreds of millions of people around the world. New research shows that ...