The Blue-Crested Blaster is a rare type of jellyfish that appears in the episode "The Pink Purloiner." It, along with many other rare and exotic jellyfish, appear in Jellyfish Fields during the annual jellyfish migration.
It is blue and has a rooster crest on its head. It looks similar to another blue jellyfish, Friend. It has five white spots on it and four stingers.
Role in episode
While SpongeBob and Patrick are at the jellyfish migration, they spot the Blue Crested Blaster.