Prior to 2003 it was considered to be a subspieces of California Sea Lion ("Zalophus californianus japonicus"); however, it was subsequently reclassified as a separate species.
However, it was subsequently reclassified as a separate species. Prior to 2003 it was considered to be a subspecies of California Sea Lion as "Zalophus californianus japonicus".
Prior to 2003 it was considered to be a subspecies of California Sea Lion as "Zalophus californianus japonicus". However, it was subsequently reclassified as a separate species.
Prior to 2003 it was considered to be a subspecies of California Sea Lion as "Zalophus californianus japonicus". However, it was subsequently reclassified as a separate species.