Grunion The normal lifespan of the grunion is three to four years, although individuals up to five years old have been found. Their growth rate slows after the first spawning and stops completely during the spawning season. Consequently, adult fish grow only during the fall and winter. This growth rate variation causes annuli to form on the scales, which have been used for determining ages. California grunion spawn on beaches from two to six nights after the full and new moon beginning soon after high tide and continuing for several hours. As a wave breaks on the beach, the grunion swim
USS Grunion Iwasaki. He sent them a translation of an article written by the officer who had commanded the merchant ship "Kano Maru". The article described an encounter with a submarine near Kiska Island in the Aleutians about the time the "Grunion" was reported missing. Several years later, John Abele, cofounder of Boston Scientific, met Dr. Robert Ballard, famous for discovering the RMS Titanic's wreckage. Ballard gave him advice on how to locate a shipwreck, and Abele decided to fund an expedition to find the lost submarine "Grunion". In 2006, Williamson Associates, using side-scan sonar, located a promising target at almost at