Fish are among the most diverse and widespread animals on Earth, occupying nearly every aquatic environment imaginable. But not all fish are equally equipped to survive the pressures of modern ...

In response to social cues, individual clownfish will switch sexes. Cutting-edge research reveals the neural and genetic ...

Spinosaurus, the only known semiaquatic dinosaur predator, joins Tyrannosaurus, Giganotosaurus and Carcharodontosaurus among the largest meat-eating dinosaurs.

A paper published in Science describes the discovery of Spinosaurus mirabilis, a new spinosaurid species found in Niger. A 20-person team led by Paul Sereno, Ph.D., Professor of Organismal Biology and ...

At a remote and barren Sahara desert site in Niger, scientists have unearthed fossils of a new species of Spinosaurus, among the biggest of the meat-eating dinosaurs, notable for its large ...

Scientists discover a 518-million-year-old ancestor with four eyes. Study shows how this ancient jawless fish evolved into the modern human sleep gland.

Caribbean reef food webs have compressed by up to 70% over the past 7,000 years as fish diets converge and ecosystems become ...

Ancient lungfish fossils show how early fish evolved features that eventually allowed animals to leave the water and adapt to life on land.

Stacey Leasca is an award-winning journalist with nearly two decades of newsroom experience. She is also the co-founder of Be a Travel Writer, an online course for the next generation of travel ...

The ocean sunfish looks like an evolutionary mistake: no tail, no ribs, no axial swimming muscles, and a body that appears half-finished. Yet it is the heaviest bony fish on Earth, reaching weights ...