2 Joined: 03-August 12 Posted 03 August 2012 - 02:14 PM the plural of octopus is octopedes , not octopi, because it i s (Latinized) Ancient Greek , from oktṓpous (ὀκτώπους), gender masculine, whose plural is oktṓpodes (ὀκτώποδες). If the word were native to Latin, it would be octōpēs ('eight-foot') and the