Crayk

Crayk is the large, hermit crab-like boss in the Temple of Courage in Phantom Hourglass.

Strategy
When the battle starts, it turns invisible, but on the top screen, the room is shown from Crayk's viewpoint (presumably because of the second half of the Fairy of Courage it is guarding). When the top screen shows it charging at Link, the young hero must fire off an arrow, (on the top screen, the player can see Link aiming at themselves) and it will withdraw into its shell. If Link fails to fire an arrow at it, Crayk will grab him, and the player must move the stylus back and forth in order to break free. When in its shell, Link can throw bombs at it. Link can also use his sword or arrows to break the purple orbs surrounding its shell (slashing it is easier, but more risky). Once every purple orb has been destroyed, Crayk's shell will fall off, leaving its tail vulnerable. The young hero must then fire arrows at Crayk to stun it and then slice its tail.

Throughout the battle, small creatures known Crayklings roam the battle area. They resemble miniature, yellow versions of Crayk, and may be its offspring. Easily defeated, they drop arrows and Recovery Hearts when killed, making them a valuable resource in addition to the jars in the room.

Once Crayk is defeated, it will turn into Sand of Hours and Link will get a Heart Container and the second half of Ciela.

Trivia

 * Crayk has the Kokiri symbol on his shell repeated over several times.
 * Crayk's name is a possible reference to the crayfish, a crustacean resembling a lobster. This is supported by its appearance without his shell.
 * If the boss room is examined closely, it is actually set in a dark forest.