"Sennet" "commenced hot pursuit" of "No.8 Kotoshiro Maru". Northern sennet are also known as northern barracuda. "Sennet" patrolled north of the Bonin Islands until 28 January. Northern sennet can only be found in the western Atlantic Ocean. Southern sennet have six spines, and 9 rays on their dorsal fins. Northern sennet are olive-colored, dorsally, and silvery-white ventrally. "Sennet" was fitted out by 18 September. Although they are generally harmless, Southern sennet have been linked to ciguatera poisoning. Sennet then suspended all 160 pupils for a day. Southern sennet are sometimes used as a food fish, and marketed either fresh or frozen. "Sennet" was the direct predecessor of "London Student". While going deep, "Sennet" was rocked hard by two aircraft bombs which exploded beneath her.