Plasmarine

Plasmarine is a jellyfish-like boss that haunts the inner bowels of Jabu Jabu's Belly in The Legend of Zelda: Oracle of Ages. Link had to fight this beast to acquire the seventh Essence of Time (the Rolling Sea), necessary to restore power to the Maku Tree and destroy the sorceress Veran. Plasmarine had two attack modes: blue, in which it hunted down targets and shot bolts of electricity at it, and red, when it attempted to electrify itself to hurt nearby intruders. Link destroyed the creature by using the Long Hook to flip Plasmarine onto its own electrical bolts.