Fight your way past an Octobomber and Octodiver here to reach this Inkzooka. Swim along the narrow path ahead, toward an Octocopter, until two Shielded Octotroopers appear on the neighboring platform ahead. Retreat to a safe distance and activate the Inkzooka, using it to take out these enemies. But watch your footing—each shot fired pushes you backward, potentially knocking you off this narrow walkway.
This pinwheel is configured vertically, like a windmill. Stand on this elevated platform and ink as much of the pinwheel as possible. Ink the front face of the pinwheel as well as the inside surfaces of its two thick blades. When it’s thoroughly inked, swim and then jump to the inked front face of the pinwheel. Transition to the inside portion of the blade and spread more ink if necessary before swimming through one of the nets. As the blade rotates to a vertical positon, swim up and jump onto the platform above. If you fall at any point, backtrack to the elevated platform, using a Gusher to quickly reach the top.
In this section, you must traverse two moving horizontal platforms while avoiding two pinwheels. Eliminate the Octotrooper on the first pinwheel, then hop onto the moving platform—leap over the thick blade of the approaching pinwheel while swimming through its nets. Leap to the next moving platform and target the Octotrooper riding the pinwheel ahead. This time, jump onto one of the thick blades of the pinwheel and ride it around until you can safely drop onto the stationary platform ahead.