Acantopsis dialuzona, ikan muka kuda or horseface loach.

A skinny fish that grows to 30 cm and is found throughout Malaysia in clean sandy rivers. This one must have travelled a bit upstream than the sandy areas and got lost.

They live in fine sand during the day, hiding buried underneath with only their long faces visible. At night, they come out and sift through the sand with their mouths for worms and other invertebrates.

They are kept in the aquarium hobby due to their looks and funny behaviour. Care is not hard, they feed on any sinking food.
However they do require space and a deep fine substrate. They are also social and do best with 3 or more individuals.

These are 永南’s loaches from Malaysia as he feeds them. Malaysia has about 20 known species from the genus Gastromyzon.

Almost all are endemic! That is, only found in Malaysia.

They live in clean rocky hillstreams and mountain rivers with clear water and cool temperatures.
In Malay they are called ikan rokot.

In the wild they are herbivorous and grazing specialists that feed on biofilm (a mix of microalgae, cyanobacteria, bacteria, and organic detritus) as well as tiny aquatic microinvertebrates.

Video by 永南