Zora Egg

The Zora Eggs are part of a mandatory quest in Majora's Mask. They were laid by Lulu and likely sired by Mikau.

Location
One night, Lulu heard a strange sound late at night in her room, and when she opened her eyes, saw the Gerudo Pirates entering her room. Despite her attempts to fight back, they were able to steal her precious eggs. Mikau tried to take back the eggs that were taken by the thieving women by going to their hideout, the Pirates' Fortress; however, he failed and ultimately ended up floating half dead near the Great Bay Coast.

According to the professor in the Marine Research Laboratory, it takes about one to three days from the time the Zora eggs are laid for them to hatch. Since the eggs are extremely sensitive to changes in the temperature, the professor set aside an aquarium where the Zora eggs would be placed until they were hatched. If they aren't kept in the specially-made aquarium, the Zora eggs may die, for the recent abnormal weather in the Great Bay region has caused the ocean temperature to significantly rise.

It is up to Link to infiltrate the Pirates' Fortress and recover four of the seven eggs that were stolen by the Gerudo. Once he transports the eggs to the Laboratory aquarium using empty bottles, the must travel to the murky waters of Pinnacle Rock to retrieve the last three eggs. Within the dangerous waters live many Deep Pythons who guard the Zora Eggs in their caves. As Zora Link, the enormous serpents must be defeated to be able to scoop in the missing eggs.

Uses
When the seven Zora eggs are finally reunited inside the aquarium, they hatch and teach Link the New Wave Bossa Nova. This new melody must be played in front of Lulu in order for her to recover her voice. It will also awaken the guardian of Great Bay, who will take Link to the Great Bay Temple.

Trivia

 * It is possible to sell a Zora egg to the Curiosity Shop for 20 Rupees each. Selling any of the eggs makes it impossible for Link to learn the New Wave Bossa Nova during the current 3-day cycle.
 * The occurrence of the eggs hatching and forming eighth notes within a song is likely a visual pun on the Japanese word,, which means "tadpole", but can also mean "musical note".