Green Jellyfish

The Green Jellyfish is a hardmode enemy found in the underground and is far stronger than the Pink or Blue Jellyfish. They have a chance to inflict the Silenced debuff when attacking.

Depending on whether it is killed inside of the Underground Hallow or the Underground Corruption, souls of Light or Night (respectively) can be dropped. They can be quite a "shock" to players first entering hardmode because they deal large amounts of damage.