The Glass Catfish (Kryptopterus vitreolus) is a small transparent freshwater fish. It is also called the Ghost Catfish or the Phantom Catfish.

The Glass Catfish is transparent, and it does not have outer scales. Therefore, its organs are visible – even its heart can be seen. Most of its organs are located near its head. It has two long barbels (string-like structures) near its mouth. When it dies, it becomes milky white.

Glass Catfish

It measures about 8 centimetres (3 inches) long.

The Glass Catfish is native to Thailand rivers. It prefers rivers with reeds and grassy river beds. It prefers to swim in the middle of the river – not on the bottom and not on the surface. It also prefers dark places, such as in caves and in hollow logs.

It eats mosquito larvae, worms, and brine shrimp.

It is usually seen in groups.

Glass Catfish

Glass Catfish

Photographer: Martina Nicolls

Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM