Fish transitioning from marine to freshwater habitats is a complex adaptive journey involving multiple polygenic traits. This parallel evolution of rapid freshwater adaptation, scientists note, ...

In the fascinating underwater world, gender is far from fixed. Many aquatic animals can change their sex, a unique biological process known as sequential hermaphroditism. This natural adaptation ...

Interactions between farmed and wild fish influence the evolutionary trajectories of natural populations and the sustainability of aquaculture. Domestication in controlled environments selects for ...

University of Washington scientists have made a remarkable discovery: real teeth growing on the forehead of a deep-sea ratfish. This finding sheds light on the unique adaptations in fish anatomy, ...

Marine fish populations exhibit complex genetic structures shaped by high connectivity, local selection pressures and human exploitation. Genome-wide analyses now reveal that even species with ...

Get your news from a source that’s not owned and controlled by oligarchs. Sign up for the free Mother Jones Daily. In the world’s waters, fish are making a quiet, biological retreat. The once simple ...

Scientists tracking blind Mexican cavefish uncover a striking evolutionary reversal where existing brain circuits are rewired via dopamine to flip behavioral responses to light.

The Polish Geological Institute-National Research Institute reports a Lower Devonian (419 to 393 million years ago) fossilized trackway in the Holy Cross Mountains, Poland, attributed to dipnoan fish.