Unfinished business

Out of the Muck: Start Act 2 by navigating water areas. Use blue kelp ramps to sail forward.

Clapperclaw Cove: After dropping down, focus light on crab creatures' orange kelp to make it grow. Follow the water to a kelp ramp, drop down, and take a left past a shipwreck into a cave.

Slime Grotto: In the cave, take the right path by breaking a blockade (A). Focus light on Wither sacs on rocks to create a path. Break through two more blockades with Wither sacs. Sail left through an archway and focus light on the bottom-left blue sac to remove a Wither blockade. Sail through open rocks. Break another Wither sac to the right, then dash through a blockade and follow vines. Find and break a second Wither sac, then follow a vine to the right to break the last Wither sac, creating a path forward. On the next doorway, focus light on a Wither sac, then sail right through a blockade. To the right, break a second Wither sac to illuminate blue sacs at the top of a rock, opening the doorway. After going through, follow the stream to reunite with Seabird and continue forward and left.

Molter Run: Sail beside two whale-like creatures, using the L-Stick to move back and forth.

The Coral Sanctum: After cutscenes, sail through an archway. Dock at a pink coral house (A) and pick up waiting creatures. Behind the house, a gate will fall. Press X to send Twig over to lift it, using the L-Stick to raise it. When baby Twig helps, use the R-Stick simultaneously to lift it fully. Sail through quickly before it falls. On the big coral island, deliver three of the same critters picked up earlier. To get more, sail around and pick them from their homes, then dock at the big island to drop them off.

Coral Sanctum - Critter 1: Sail right of the big coral island and take another right to break blockades. Focus on a flower to earn the 'Guardians of the Sea' achievement. Turn left to find a coral house corrupted by Wither. Find and destroy the first Wither sac, then follow the vine to destroy the rest. Pick up the critter and return it to the main island.

Coral Sanctum - Critter 2: Sail past the main island to the right corner. Light the red/orange corals to draw crabs over, then dock (A).

Coral Sanctum - Critter 3: Go past the main island and take a left. Dock to pick up this critter and bring it back to the main island.

Coral Sanctum - Fuse: After delivering all four critters to the main island, they will drop a fuse on the right side. Approach and press X for Twig to collect it, using the L-Stick to tug it down. Bring the fuse to the device behind the main island and 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 to the next area.

The Lock Keeper: A large machine with a steam vent is ahead. Go to the power device in front and press X for Twig to slot the fuse. Two more fuses are needed. Sail back toward the entrance and left, to a small coral house with lights. Press X for Twig to go to the crank. Use the L-Stick to move a large claw under a water stream. Once filled, move the claw over a crab, then focus light on the claw to overturn it and free the floating critter. Go to the locked gold gate left of the house. Approach it, then focus your light on the eye below the large light to open the gate and enter the cave.

The Lock Keeper - Fuse 1: Inside the cave, sail right and break a Wither sac. Behind it, find a fuse. Send Twig to collect it using the L-Stick to tug it free.

The Lock Keeper - Critter 2: Go back and 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, then break it. Focus light on the wall to reveal the last sac.