Spotted Hillstream Loach Sewellia lineolata

The Spotted Hillstream Loach, also called Gold Ring and the Reticulated Hillstream Loach (since many hillstream loaches are spotted), is native to mountain streams of Vietnam, Cambodia and China.

They grow to some 6 cm long. Their body forms a suction cup to adhere to rocks in fast-flowing streams. Diet is algae from the rocks. Males perform fluttering displays to court females.

Patterns vary, but these would appear to be different subspecies or even species?