Thyrsites atun (Atun) is a species of ray-finned fishes in the family snake mackerels. They are associated with freshwater habitat. Individuals are known to live for 10 years and can grow to 200 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