Occasionally taken at Moss Landing Harbor-Elkhorn Slough. Juveniles and adults were captured at the Potrero and Hunters Point power plants on San Francisco Bay. There is little knowledge of the spawning habitats of this species. Larvae are pelagic. The age of maturity of the spotted cusk-eel is poorly known.
Adults tend to be nocturnal.
Specimen Verification Specimens measuring 3.7 and 4.3 mm TL were confirmed by Eliane Sandnop, National Marine Fisheries Service, La Jolla, California.