Scientists have debated whether the evolution of teeth occurred outside-in or inside-out. Sawfish fossils may hold the answer.

Researchers pulled a coelacanth caught in 1960 from its jar of alcohol in a museum and gave it an MRI. Doing so reveals some of the fish's mysterious ways.

The megalodon was an even more fearsome predator than previously thought, able to take down prey the size of modern orcas.

Migratory fish populations have collapsed worldwide in the last 50 years.

Research shows that coral reefs' diversity of fish results from a relatively recent innovation among bony fish: biting prey from surfaces.

In a new study researchers determined that people who eat about 2.6 servings of fish per week have a higher risk for the skin cancer melanoma.

The first hammerhead shark was likely the result of a genetic deformity. A biologist explains how shark DNA reveals hammerheads’ history.

The newly discovered species – Qikiqtania – highlights evolution’s twisty, tangled path.