Appearance
Aulostomus chinensis is a medium-sized fish which grows up to 80 cm in length. Its body is elongated and compressed laterally, with a long, tubular snout which has a small barbel at its inferior extremity. The protrusible mouth can be extended forward to catch prey. On the top posterior part of the body, the dorsal fin is composed of two parts, the first anterior is a set of isolated spines and the second is a small ray fin. This latter fin is similar in shape to the anal fin which is just under. The pelvic fins are located in the middle of the body and are small, with one basal black spot.

