Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data from nearly 15,000 marine and freshwater fish communities. They found that ...

Tuna, opah, and billfishes such as marlins and swordfish are among the 0.1% of fish species that are warm-blooded. Evidence by an international team of researchers led by UC San Diego’s Scripps ...

Migratory species don’t travel with a passport, but they cross borders all the time. This makes the animals’ conservation a uniquely challenging, international effort. That effort needs a lot of work, ...

A collaborative team of scientists recently found that there is no physiological evidence supporting a leading theory -- which involves the surface area of fish gills -- as to why many fish species ...

Ashlee Lillis’ interview subjects don’t talk. But they have plenty to say through grunts, growls, clicks and other odd noises. “I put my hydrophone — which is our underwater microphone — on the end of ...

Interspecies communication was once thought to be rare outside of humans and apes, but research has shown it occurs in a variety of animals, including birds, cetaceans, and even fish. Doing so ...