Octopus

Octopus can refer to:
 * Octarians, a race based on octopuses.
 * Octoling (playable), refered simply to as "octopus" (タコ) in Japanese.
 * Octolings in their octopus form.
 * The Octoling Octopus amiibo.

Or the Splatfest events:
 * Squid vs. Octopus (Splatoon)
 * Squid vs. Octopus (Splatoon 2)