Scientists have discovered an unusually large, undescribed cave fish that may still be evolving.
The International Plant and Animal Conservation (FFI) said it has discovered an eye-free cave-dwelling fish and scales on a small island in Vietnam's famous scenic area - the Bay.
Scientists return to the image of a catfish crawling on the surface of the cave to get food.
Fishermen at the University of Louisiana and the University of Kentucky (USA) have announced the discovery of a new fish species living in caves in southern Indiana.
When blind, hearing organs often develop better. But this is not true for Mexican blind fish or subtropical American fish.