There is no under water land, but there is the sun key in a box on the sea floor. You have to get the Salvage arm and get the box.
You can't you have to get the salvage crane from eddo
the six sages are on Legend of Zelda Ocarina of Time not Phantom Hourglass
you need to get 10 power gems then you go to sprit island and talk to the water thing and click on power.Then you goto colletions and tap the spirt of power and there you go!
The thing is, you can't but, you can get a hookshot in the water temple and two hookshots in the sky temple.
In "The Legend of Zelda: Phantom Hourglass," the Cyclone Plate features symbols representing the four winds: North, South, East, and West. Each direction is depicted with a unique design, often resembling swirling patterns or gusts. When activated, the Cyclone Plate allows Link to summon a cyclone that transports him across bodies of water. The plate's symbols embody the game's theme of exploration and navigation.
What does this have 2 do with Phantom Hourglass?
you must lower the water
You can't get unlimited time. You have to defeat bosses to get more time on your phantom hourglass. Once you defeat all bosses you might get unlimited time...Maybe but I doubt it. You can also get more time by the treasure underneath the water. You can find out where you find the treasures by getting treasure maps. After you get the map you get a savage arm and get it from under the sea. The Maximum time given is 25 minutes. Unless you cheat you cant get unlimited time. Sup guys
Use the boomerang to chance it's direction.
no, you can only jump when you walk link off of an edge, but in the water diectly.
Breathe under water
Randomly sail around, when you get te sharks you'll see purple fins in the water and the enemy sign on the map. To defeat them, use the cannon to hit their fin, and when they jump out, hit them again.