Digdogger

Digdogger is a recurring boss in the Zelda series, appearing in both the original The Legend of Zelda and Oracle of Seasons.

The Legend of Zelda
The Digdogger makes its first appearance in The Legend of Zelda. Digdogger is a large sea urchin that shrivels up after a sound attack. To defeat the creature, Link must play the recorder to shrink the creature into a much smaller version of itself; however, some variations will have the Digdogger split into multiple smaller versions of itself. From there, Link can easily defeat Digdogger and reclaim the piece of the Triforce guarded in the Lizard Labyrinth. A larger version appears in the Demon Labyrinth as a mini-boss. In the Second Quest, it guards the Triforce fragment found in the Lizard Labyrinth.

Oracle of Seasons
The Digdogger in Oracle of Seasons is defeated in an entirely different fashion than its predecessor. Using the Magnetic Gloves at north polarity, Link causes the spiked ball that lay in the boss area to smash right into Digdogger. After a few smashes from the spiked ball, the Digdogger will split into its smaller versions. Link must hit each of them with the spiked ball or sword to win the Nurturing Warmth, the fifth Essence of Nature.

Trivia

 * Vitreous, the boss of Misery Mire in A Link to the Past, is called in Japanese. The suffix -dogger, in addition to its eyeball appearance, connects it to Digdogger. The prefix gel- is probably a reference to the Gel enemies, whose name is pronounced with a hard G sound in Japanese rather than being pronounced like the English world "gel." Possibly coincidentally, the first part of the name resembles a contraction of the geld- prefix of the desert-dwelling Geldman and Geldarm enemies; although Vitreous's dungeon is in the Swamp of Evil in the Dark World, the swamp's location corresponds to the location of the Desert of Mystery in the Light World, which has the aforementioned Geldman enemies.