Opposition (13)

Start by navigating through the water, using blue-colored kelp ramps to gain speed.

In Clapperclaw Cove, focus light on orange kelp to make it grow. Follow the water to a kelp ramp, drop down, and take a left into a cave past a shipwreck.

In Slime Grotto, take the right path by breaking a blockade. Focus light on Wither sacs on rocks to create paths. Break through blockades by dashing. Follow vines and break Wither sacs to create a path forward. Use light to clear Wither blockades blocking blue sacs.

In Molter Run, sail alongside two whale-like creatures, only using the L-Stick to move.

In The Coral Sanctum, dock at a pink coral house to pick up creatures. Use Twig (X button) to lift a gate, using the L-Stick and R-Stick simultaneously.

Deliver three of the same critters to the big coral island.

Sail right of the big coral island and take another right to break blockades. Focus light on a flower to earn the 'Guardians of the Sea' achievement.

Cure Wither vines/sacs around a coral house to pick up a critter. Bring it back to the main island.

To get the next critter, sail past the main island to the right corner. Light red/orange corals to draw crabs, then dock.

For the last critter, sail past the main island and take a left. Dock to pick it up and bring it back.

Deliver all four critters to the main island to get a fuse. Use Twig (X) to collect it, using the L-Stick to tug it free.

Bring the fuse to the device behind the main island, press X to slot it in. Sail toward the powered light and approach large Wither roots to clear the path. Sail over the blue kelp ramp.

In The Lock Keeper, slot the first fuse into the machine's power device (X).

Sail back to the entrance area and to the left. At a coral house with lights, press X to send Twig to a crank. Use the L-Stick to move a large claw under a water stream.

Move the filled claw over a crab, focus light on the claw to overturn it, freeing a floating critter.

Go to the locked gold gate left of the house. Focus light on the eye below the large light to open it.

Inside the cave, sail right and break a Wither sac to find a fuse. Send Twig to collect it.

Sail to the left side of the cave. Break Wither sacs to free a critter. Send Twig to the right sac (X) to reveal it. Focus light on the wall to reveal the last sac.