hill-stream loach

The hill-stream loach is a type of freshwater fish belonging to the family Cobitidae. These small, elongated fish are adapted for life in fast-flowing mountain streams, particularly those found in southeastern Asia. A notable adaptation is their ventral suction disk, formed by expanded pectoral and pelvic fins, which allows them to adhere to rocks and resist strong currents.1

Loaches, in general, are hardy, often nocturnal fish with small scales and barbels around their mouths used for finding food like worms and insect larvae. Some species can also swallow air to aid respiration in stagnant water. While many loaches are found in Asia, some species inhabit Europe and northern Africa. Certain Asian loaches, such as the clown loach and kuhli loach, are popular in aquariums.2