All-female species have been long thought of as evolutionary dead ends – but one fish has defied the odds to live without ...

It may sound too bizarre to be true, but the Amazon molly (Poecilia formosa), a fish that inhabits rivers, lakes, and swamps ...

Scientists have peered inside the skull of a 380-million-year-old Antarctic fish that was closely related to the first animals to walk on land, revealing surprising clues about how life began its move ...

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, ...

In Thailand, squid is commonly referred to as a “fish” in everyday language, a habit many people grow up with without ever ...