Gel

Gels (ゲル, Geru) are common, small, jelly-like enemies mostly found in the two dimensional Zelda titles such as The Legend of Zelda, the Oracle titles, and Four Swords. However, they will make their first 3D appearance in the upcoming Wii game Skyward Sword.

Characteristics
Gels are circular, often green or red blobs that tend to bounce aimlessly around wherever they are found, whether it be within a labyrinth, as seen in The Legend of Zelda, or across the overworld, as seen in Link's Awakening. Overall, these foes are renowned in the Zelda universe for their weak attacks and slow movement, both of which make an enemy such as this a small threat to any who happen to cross paths with it. In The Legend of Zelda and Link's Awakening especially, the Gel is a close relative to the Zol, a foe that behaves and physically appears to be a larger variation of the Gel. Intensifying this connection is the Zol's ability to split into two Gels when attacked, however, the Gel itself is an self-sustaining enemy onto its own, as it is known to appear without the presence of Zols.

Only in A Link to the Past do these enemies come in colored varieties, and even then only function as such to show a difference in vitality (the red are the most difficult to defeat, while the standard green are the simplest). The Gels present in Link's Awakening, Oracle of Ages, and Oracle of Seasons are quite unique in that they do not cause damage, but can attach themselves to Link's body similar to the way Morths do in The Wind Waker and Slime in Phantom Hourglass, impeding Link's movement.

Weaknesses
As Gels are common overworld enemies in the majority of the titles they appear in, they can be defeated with the most conventional of weaponry, including the Sword, Bomb, Boomerang, and the like.