Opposition (12)

In Clapperclaw Cove, follow the water, take a left past the shipwreck into a cave.

In Slime Grotto, break blockades and focus light on Wither sacs to clear paths. Follow the linear path, breaking more Wither sacs and blockades.

In Molter Run, follow the whale-like creatures using the L-Stick.

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

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

Sail right of the big island, break blockades, and focus on a flower for 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 to the right corner past the main island. Light red/orange corals to draw crabs, then dock.

For the last critter, go 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. Send Twig to collect it.

Bring the fuse to the device behind the main island, slot it in, and sail toward the powered light. Approach large Wither roots to clear the path, then sail over the blue kelp ramp.

In The Lock Keeper, slot the first fuse into the machine.

Sail back to the entrance, then left to a coral house with lights. Send Twig to the crank, use L-Stick to move the claw under water, then over a crab. Focus light on the claw to overturn it, freeing a critter.

Go to the locked gold gate, focus light on the eye below the large light to open it.

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

Sail left in the cave, break Wither sacs to free a critter. Send Twig to the right sac, then focus light on the wall to reveal the last sac.