Pulse Bombu

The Pulse Bombu is a creature that consists entirely of raw electricity. It glows as it floats through the air. It periodically releases explosive segments from its body and lacks any intelligence other than an instinctive attraction to charged energy sources.

Samus encounters Pulse Bombus in the Chozo Ruins, Phendrana Drifts, and the Phazon Mines on Tallon IV. They pose no threat to her, though they will occasionally release explosive segments which will cause damage to her. They can only be damaged by electrical energy, requiring Samus to use her Power Beam on them. However, if she charges her Power Beam, due to their attraction to charged energy sources, they will instinctively go up to her, damaging her if they get too close. To prevent this, she simply has to avoid using the Charge Beam near them.