Bostrychus aruensis (印尼烏塘鱧) is a species of ray-finned fishes in the family Butidae. They are associated with freshwater habitat. Individuals can grow to 18.0 cm.
Definition: length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal fin