Crash Bandicoot: The Wrath of Cortex
Crash must avoid them or he will be electrocuted. They can only be destroyed by missiles from the submarine or by Aku Aku invincibility, as they can shock Crash from far distances. They will continuously file out of pits in the ground. Crash must either quickly maneuver past them, or blast a hole through the line of jellyfish and move through.
Crash Bandicoot: The Huge Adventure
They reappear in this game. Unlike before, they can be defeated by Crash's spin.