The Jellyfish Warrior is a jellyfish monster created by Finster. He is the main antagonist of the episode "Reign of the Jellyfish".
He is voiced by Richard Cansino.
The Jellyfish Warrior was created by Finster. Rita sent him to the Earth to simply destroy the Rangers without any plan. Jellyfish Warrior could fire the acid from his left arm, that could harm even morphers and from right energy beams.
The Jellyfish Warrior was powerful opponent for rangers. He could teleport and even made the Rangers retreat. Then he summoned the squad of Super Putties. He also wielded a umbrella shield and teleported the Rangers to the other dimension.
In his dimension, Jellyfish Warrior was intangible and Rangers couldn't harm him. Billy told that the shoot from Power Blaster will return them to the Earth. They did it and returned. Plus, Jellyfish Warrior suddenly was weakened and Zack took him down with a single slash of his ax.
Rita enlarged him so the Rangers summoned their Zords. The Jellyfish Warrior was blasted by the Dinozords but deflected the blasts with his umbrella so they formed the Megazord. The monster very easily overwhelmed the Rangers but they quickly summoned the Power Sword and threw him to the ground before taking him down once and for all with the energized weapon.
Five long years later, the Jellyfish Warrior was also among the monsters who aided Rita and Zedd's attack on the Vica Galaxy in and was destroyed by Zordon's energy wave.
The Jellyfish Warrior is cunning, intelligent, strong and resourceful (just like many other monsters of Rita). He was formidable opponent for Rangers, and they had to work hardly to defeat him. He is also genuinely loyal to Rita, and later Lord Zedd.