Amphilius jacksonii (Marbled Mountain Catfish) is a species of ray-finned fishes in the family loach catfishes. They are associated with freshwater habitat. Individuals can grow to 11.9 cm.
Comment: "Small" is ambiguous. For details on "Small rivers" (e.g. the Salween river) see http://worldwildlife.org/biomes/small-river-ecosystems. This class will be replaced with a less ambiguous class.
Definition: length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal fin