Alright, it’s time to tackle the Lakebed Temple. Begin by swimming through the tunnel to enter the actual temple.
Inside this room, climb the staircase and jump off the platform to grab the suspended gold lever to open the door behind you. Go through it to the next room.
Wander forward a few feet to trigger a dropping stalactite. This should clue you in as to your next objective. Equip your Bow & Arrow Combo and shoot the remaining stalactites to drop them to the ground. Cross the room using the fallen stalactites to reach the door.
Go over the bridge into the next room. When there, ignore the chain and proceed go down the stairs and then right at the base. Then turn right until you reach the lever in the south end. Grab it to rotate the staircase to where you’re facing and proceed upstairs.
At the top of the staircase turn right and continue until you find the chain on the east side. Activate it to again rotate the staircase to your position, then proceed down it and turn right to find the map. Now enter the door by the bottom of the staircase.
Cross over the hallway into the next room. From the entrance, shoot the two large stalactites hanging from the ceiling. Proceed through the tunnel to your right where you can now cross the gap. Latch onto the vine covered wall and climb counter-clockwise around the structure. At the end, drop to the ground, then cross over the two nearby platforms over to a treasure chest on the West side. Inside is a Small Key. Now drop down and climb the vines and exit through the way you came in.
Now run clockwise around the room and open the locked door between the two red pillars on the West side of the room.
Cross the bridge over to the room on the other side. Shoot down the two stalactites on the right side of the room. Now run over and jump on the left one to reach the vine covered wall. Climb over to the right side and drop off and jump towards the lever. Now blow up the rock dead-ahead with a bomb and proceed through the door at the end of the path.
Inside, you’ll see a little creature hop into a water bubble. Ignore him for now and exit out of the room through the door on the east side.
Drop down and open the chest at the end for a Small Key. Now run halfway back up the path and open the door on the right side.
You’ll emerge in a room with a giant platform in the center. Exit out the door on the other side.
Turn left and go back into the room at the end of the tunnel and open the locked door
Drop down and climb the vine covered wall on the east side. Then proceed all the way up the ramp and climb either of the two ladders at the top. Once there, jump over to the hanging lever to open a watergate.
Now jump into the water filled room below and swim to the center platform and grab the lever. This will open another gate allowing the water to flow into the next room. Enter that room through the south (it’s the one you just came from) and go through the left door.
Continue to the end of the hallway and go through the door on the east side.
Follow the water across the bridge and into the next room. As you enter, a short cinema will play showing the water level rising. Run to the left and activate the switch on the opposite side of the room. Then go down the stairs that rotated towards you and enter the door at the base.
Proceed across the bridge and into the next room. Here, you’ll find three rotating platforms. Hop onto one of them, and ride it to the northern door.
Head down the path to the left to find a treasure chest containing a Small Key. Now go back through the door in which you entered
Hop onto a moving platform again and right to the next door on the Western side. Unlock the door in the tunnel with your key and dive into the water. Swim to the end and use your iron boots to sink to the bottom. You’ll see a stone blocking the way. Blow it up with a water bomb and swim into the next room.
After rising to the surface, look up at the ceiling with first person view to see a giant creature hanging on. When he jumps down, he’ll unleash a plethora of creatures that will swim towards you. A spin attack is a quick way to take them down. You can also use your shield to keep them at bay.
When he leaps into the air, roll around to stay out of its landing area, as marked by its shadow. Thankfully, he’ll be stunned when he lands, so lash at his exposed tongue with the sword to teach him a lesson.
After he’s defeated, a chest will pop out containing the Clawshot.
Now use the Clawshot to grab hold of the tile in the southern end to open the door.
Exit the room through the door across the way. Use your Clawshot to latch onto the vine ceiling on the left and drop down to the door on the east side. Now head back to the main room with the rotating staircase. Once there, climb the staircase and turn left. Continue to the West side of the room and use the Clawshot on the ceiling tile to rotate the staircase towards you. This will allow the water to flow downhill into another room. Follow it through the door at the base of the stairs.
Pass through the spokes of the waterwheel and into the next room.
Jump to the first hanging platform and aim your Clawshot at the tile above the platform to the left. Drop to the platform and Clawshot to the vines on the northern side of the room and then to the vine covered pillar in the center of the room. From there, climb over to the nearby platform and Clawshot over to the vines across the way in the northwest corner. Continue over to the nearby platform and open the door. In this next room, turn right and shoot the stalactite above the right geyser. Then climb on top and ride it over the wall. After dropping down, latch onto the Clawshot tile above the door on the east side and go through the door.
From here, use your Clawshot to target the vines on the other since of the fencing along the ceiling to drop into that area. Drop down and cross the waterway to scale the ramp. Use your Clawshot to cross the broken portions. When at the top, Clawshot over to the eastern wall and open the chest to obtain the compass.
Subsequently, climb the ladder to activate the water flow, then drop to the water below and activate the chain on the center island to move the water through the temple. Now exit the way you came in (via the ceiling vines) and exit out the left door.
Go past the waterwheel and enter the door on your right. You’ll arrive in a room with some spinning cogs. Drop to the room below and hop onto one of the two spinning platforms, and then Clawshot onto one of the latches on the high platform to ride over to the eastern door.
Drop into the water and use the iron boots to go through the tunnel and blow up the boulder with the water bomb to reveal a pathway.
After going through it, use a water bomb to destroy the boulder in the Bottom right, southeast corner. Continue until you reach land and go through the door. Then latch onto the tile above to pull open a hole in the floor and lower yourself down – Do not drop down, as the hole will close. When at the bottom, open the chest for the Big Key. Jump into the water and go out the way you came in.
Now make your way back to the main room with the staircase. Jump into the water and swim to the center island and open the door with the Big Key. After falling down the hole, use your iron boots to sink to the bottom to find the Temple's boss.
Temple Boss - Morpheel
Morpheel may seem daunting, but thankfully his lack of attacks make him a push over. He has two forms with his eye is the weak point both times. Lock onto the floating eyeball amongst the tentacles and use your Clawshot to pull it towards you. Just watch out for the bomb fish swimming around during this segment. When the eyeball is close, slash it with your sword a few times to make the boss fully reveal himself.
Although he's quite a fast swimmer, Link can catch up to him by cutting through the center of the arena, or approaching him from head-on. Just stay away from its mouth as it can pull you in to deal damage. There’s an eyeball on its back that you'll have to lock on to, and then Clawshot to pull yourself over to it. Once Link gets situated, lash with your sword to deal damage (sorry, spin-attacks won't work here).
After a few attacks, the boss will be vanquished. You will then be awarded a Fused Shadow and Heart Container.