Boss

Boss can refer to one of the following:

The Great Octoweapons and their respective Octo Valley missions:
 * Octostomp: The Mighty Octostomp!
 * Octonozzle: The Dreaded Octonozzle!
 * Octowhirl: The Rampaging Octowhirl!
 * Octomaw: The Ravenous Octomaw!
 * DJ Octavio: Enter the Octobot King!

Or the Octobosses and their respective Octo Canyon missions:
 * Octo Oven: Into the Octo Oven
 * Octo Samurai: Fear the Octo Samurai
 * Neo Octostomp: The Octostomp Returns
 * Octo Shower: The Octo Shower
 * DJ Octavio feat. Callie: Tide Goes Out

Or the bosses in the Octo Expansion and their respective stations:
 * Octostomp Redux: Drop the Bass Station
 * Octo Oven XXL: Toastmaster Station
 * Revenge of Octo Samurai: Whack-Fu Station
 * Octo Shower Supreme: Cool Your Jets Station
 * Partially Sanitized Agent 3: Spinal Phase
 * Commander Tartar using the NILS Statue: Turf War
 * Inner Agent 3: Inner Agent 3

Or the Boss Salmonids found in Salmon Run.
 * Steelhead
 * Flyfish
 * Steel Eel
 * Drizzler
 * Stinger
 * Scrapper
 * Maws
 * Griller
 * Goldie
 * Mothership