Octo Canyon (location)

Octo Canyon is a hidden location near Inkopolis Square, which serves as the setting of the single player mode of the same name in Splatoon 2.

Description
There are five sectors in Octo Canyon: Tentakeel Outpost, Suction-Cup Lookout, Beaker's Depot, Slimeskin Garrison, and Cephalon HQ. Each sector has a boss kettle and several invisible kettles for normal levels. Each level contains a Zapfish (including the boss levels) that the player must retrieve at the end of each level. In certain levels, there are eight mini zapfish scattered across the level. In this circumstance, the player must capture all eight zapfish in order to earn 1 zapfish. After defeating the final level, Callie will appear and tell you random statistics about your weapons, splats, assists, accuracy and more.

Trivia

 * According to the second artbook, Octo Canyon is a short hour's trip away from Octo Valley by bus and train. The place itself holds the largest logistics base in the Octarian society and has many research facilities.