Digdogger

Digdogger (デグドガ, Degudoga) 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. Using the Recorder, play it to smash the Digdogger into three smaller Digdoggers. Play the recorder again, and the creature will become paralyzed. Use the sword to defeat the smaller versions with ease, then grab the fifth piece of the Triforce.

Aside from coming in contact with Link, Digdogger has no attacks, however, he is always accompanied by a fireball shooting Stone Statues.

Oracle of Seasons
The Digdogger in Oracle of Seasons is defeated in an entirely different fashion from 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. Hit each of them with the spiked ball or sword to win the Nurturing Warmth, the fifth Essence of Nature.