From the Super Mario Wiki
Pea Jellyfish are small Jellyfish enemies in Donkey Kong Jungle Beat. They do not attack Donkey Kong at all; instead, they flee from him. If Donkey Kong uses the sound wave attack, bulges will form on their bells. They can then be defeated by either using the attack three more times or charging into them, like Pea Frogs. They will provide two bananas when defeated.
Pea Jellyfish are found in underwater levels throughout the game.
Names in other languages