Paraplotosus butleri

Paraplotosus butleri, commonly known as the sailfin catfish, is a species of catfish in the family Plotosidae. This fish is found in coastal reefs off northern Australia in the western Indo-Pacific Ocean. It grows up to about 32.5 centimetres (12.8 in) SL.

The sailfin catfish is found in shallow coastal waters to 5 metres depth. Mature adults are completely black.