Plazmite

Plazmites are small bug-like creatures that spend a large amount of their time flying through the air in search of small organisms to feed on. They mainly avoid confrontations with other creatures though are capable of defending themselves when threatened. They can easily be spotted due to their emitting a bright, glowing light.

Samus encounters these creatures on Tallon IV in the Chozo Ruins. They do not attack her and mainly just fly around rooms. The light they emit is very useful in the dark rooms they inhabit, though killing them causes the dark rooms to become darker.