Total lengths corresponding to these male and female ages were 11.9 in. TL and 22.4 in. No data are available from California. However, data from the western Pacific Ocean indicate that approximately one half of all male and female rock greenlings are sexually mature at age 3-4 and a length of 11.4 to 13.8 inches. In the Aleutian Islands, the spawning season extends from June through August.
Females are oviparous, or egg-laying.
Nest guarding by rock greenling has not been documented. Natural Mortality Estimates of natural mortality are not available. No information is available concerning diseases in rock greenling. No information is available from California or on prey of larval rock greenling. No information is available on predators of rock greenling.