While still in the Map Room, shoot the pots across from the chest to release Stray Fairy #6 , use the Great Fairy’s Mask to collect it.
Now sink to the bottom of the water and defeat the Dexihands with Double Cutters or swim through with Electric Barrier – take the green path with the red pipe .
Bio Deku Baba Room
Defeat the Bio Deku Babas in this room, there are several underwater already and the last one is on a ledge. Open the chest that spawns to find Stray Fairy #7 . Exit this room via the door at the north end.
To start, shoot the Real Bombchu with an arrow to make it explode. Now use the Hookshot/Double cutters to defeat the Bio Deku Babas and the Dexihand at the bottom of the water. Hop into the water and open the chest at for Small Key #1 .
Climb back up and use the lily pads to reach the chest on the ledge for the Compass . Hop down the main platform and look into the water to spot two Dexihands and a jar. Shoot the jar to release Stray Fairy #8 , collect it with the Great Fairy’s Mask, then hop into the water.