Glass catfish (Kryptopterus bicirrhis) — is a kind of freshwater ray-finned fishes of catfish family that inhabit in South-Eastern Asia. The first thing that catches the eye when you see this fish is how transparent it is – you can clearly see its visceral and spine.
So, it becomes quite clear why this fish is called a glass one. Glass catfish are rather sensitive to their tank water parameters change and it should be put only into a settled tank with low nitrates level.
Besides, the fish is rather timid and sensitive one, so it should be kept only in a school and with some peaceful tank mates.