Tuna, anchovies, mackerel, whales, seals, and, squid feed on saury. In the eastern Pacific, there is a trend of increasing length and average age with increasing latitude. Maximum size found was 364 mm. Saury are capable of reaching first maturity at lengths near 200 mm, by two years of age. Estimated maximum age is 6.5 years.
Some researchers disagree on aging techniques.
Most aging in the past has been done using scales. However, recent studies using otoliths suggests growth of Pacific saury is faster than previously thought. Maximum age may be only two years. Migration Saury in the western Pacific migrate north in the spring and summer and south again in the fall and winter following the optimum water temperatures. Similar seasonal migrations have been found in the eastern Pacific.