Ray

One of Australia's most dangerously overfished species, redfish (Centroberyx affinis), will continue to be served on our dinner tables following its latest listing as "conservation dependent." The classification is a loophole allowing species that qualify for critically endangered listings and protections to instead be killed and sold for seafood.

Rare, complete fossils of ancient fish discovered in Alberta are helping fill in the gaps in our knowledge about which freshwater fish were living in North America at the end of the age of the dinosaurs, and how they evolved into their modern descendants.

Ocean fish stocks have been increasingly exploited over time, and remote sensing shows they have declined in the open ocean over the last three decades, particularly in the tropics. But it's uncertain how fish populations will fare in the future, as climate models show both increases and decreases in global trends by the end of this century.

Paleontologists at University College Cork have discovered that the evolution of fish is linked to the shape, location and abundance of tiny melanin-rich granules called melanosomes. These features survive in 300-million-year-old fossil fish, suggesting that melanosomes have played a key role in vertebrate evolution since the major fish groups evolved around 445 million years ago.

Dr. Martin Wessendorf is a neuroscientist and an associate professor emeritus at the University of Minnesota. His work focuses on how the brainstem controls the function of neurons in the spinal cord. Daniel Wang also researches the brain, focusing on cognitive neuroscience and neurodegenerative diseases.