Use the ink spread by Seekers to sneak past the two Flooders on this platform to retrieve the key (on the right side) and open the vault—watch out for Octodivers hidden in the purple ink. The launchpad within the vault launches you to the platform’s upper level. Here you come under attack by Twintacle Octotroopers riding atop the two Flooders. Hide in your ink and ambush the Octotroopers as they move into range.
Bypass the launchpad on the upper level and drop down to this small platform to discover a hidden launchpad. If you want to collect the level’s Sunken Scroll and some Power Eggs, use this launchpad to reach the platform in the center. The launchpad above completely bypasses this area, taking you directly to the final platform.
There are six Flooders patrolling the lower portion of this platform. Veer left and use Seekers to paint narrow stripes of ink down these narrow corridors to reach the key. Return to the vault to access a Gusher providing access to the platform’s upper level. An Octosniper has appeared on top of one of the Flooders—the other Flooders are topped by Octotroopers and crates containing armor. Hide in your ink and ambush the Octosniper and Octotroopers as they pass by. Use the key dropped by the Octosniper to open the vault at the back of the platform—this leads to the Zapfish.