Intrigued, researchers caught a few of the brown fish and took a closer look at the animals ... So far, Liu’s cave loaches ...

These marine environments have the characteristics of other cave types, including enclosed spaces, darkness and limited food resources. They too are inhabited by specialised troglomorphic animals.

Unlike many of the other species of animal found in the remains of the owl's roost, this boa species still lives on the island. The cave swallow (Petrochelidon fulva) is a small, stocky songbird ...

Scientists identified the tiny species of cat from a fossilized jawbone, which could date back as far as 300,000 years ago.

The species, named Sinocallipus similis, was found in the aphotic zone – an area completely devoid of light – of Khuoi Lin Cave and Na Mang Cave, according to a study published Jan.

Some of the animals have been overdrawn several times ... Because the paintings are often found deep inside caves in spots difficult to get to, it's likely that they were rarely visited and ...

Thankfully, so far, it's only been found in spiders located in several cave systems across the island of Ireland, including the Whitefathers' Caves on the Fermanagh/Cavan border. Named after Sir ...