Atropus atropos (沟鲹) is a species of ray-finned fishes in the family jacks. They are associated with freshwater habitat. Individuals can grow to 26.5 cm.
Definition: length from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body