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Astroblepus is a genus of freshwater ray-finned fishes belonging to the family Astroblepidae, the climbing catfishes or naked sucker-mouth catfishes. This genus is the only genus in its family. These catfishes are primarily found in torrential streams in the Andean area. Astroblepus pholeter and A. riberae are troglobites adapted to living in subterranean water systems. These species are typically small, less than . The largest species reaches . These fish have suckermouths like those of loricariids. They have two pairs of barbels, maxillary and nasal. The dorsal fin spine lacks a locking mech