Hypostomus carinatus is a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armored catfishes, and the subfamily Hypostominae, the suckermouth catfishes. This catfish has a wide distribution in the Amazon River basin in Bolivia, Brazil, Colombia and Peru. This species reaches a standard length of and is believed to be a facultative air-breather.
H. carinatus appears in the aquarium trade, where it is usually referred to either as the blackspotted orange pleco or by its associated L-number, which is L-166.
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