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|Kingdom:||Animalia (Animal) (WP)|
|Appearance:||SpongeBob's Atlantis SquarePantis|
|List of species|
They are jellyfish with a metallic appearance. They are made of steel, and are actually easy to defeat despite their tough appearance. Its attack is similar to that of the Green Jellyfish's attack.
- It is a counterpart to the Green Jellyfish.
- Steel Jellyfish are only seen in Atlantis.
- They are the only jellyfish made of a metal.
- Despite this, they are not very strong.