Goldfish possess genetic traits that allow them to swell up to four pounds—the size of a Chihuahua. Experts say that's why ...

The endangered desert pupfish will be released into Lake Ayer on Wednesday by Arizona Game and Fish. The species has spent ...

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, ...

The scaleless animal may look like any other fish species, but researchers noted it had “significantly larger eyes” than other similar fish they had seen before. This was a new species.

Getty Sam Fawke, senior technical officer for the Victorian Fisheries Authority, explained the importance of the fish species: "If we see these species across the board disappear, a lot are them ...

Every year, the aquatic animals die off when the swamp dries up, leaving their eggs behind to hatch when the rains return.

Scientists have discovered the fossilized remains of a new fish species called Ferruaspis brocksi, which lived 15 million ...