Jellyfish (Donkey Kong Jungle Beat)
From the Super Mario Wiki
Jellyfish are enemies in Donkey Kong Jungle Beat. Like some other enemies in the game, they do not attack. Instead, they harm Donkey Kong if he runs into them by administering an electric shock. Using the sound wave attack on these enemies will not harm them, instead making them give off more electricity. If on Orco, Donkey Kong can use his sound wave attack and defeat them, giving him two beats.
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