Jellyfish

Appearing in Yoshi's Story, the Jellyfish are giant jellyfish that live around Yoshi's Island. They are invincible to all known means of defeat, and have a greed for intruders to their waters. Jellyfish come in three colors: Blue, Red, and Green. Blue Jellyfish simply move wherever they want. Red Jellyfish chase Yoshi. Green Jellyfish simply float up and down.

Jellyfish only appear in Stage 5-1: Lots o' Jellyfish. Green ones don't appear until the third part.