Mella

These bug-like creatures are found in Norfair on the planet Zebes. Mellas exist in small swarms, and are very similar to Mellows, all except the fire they emit on their heads in a fashion similar to Novas. When undisturbed, they will hover in one area as a group, but if they are disturbed they will swoop down diagonally at the target. The best way to take care of Mellas (like most Norfair creatures) is by using the Ice Beam.

What appear to be Mellas can also be seen in a ''Metroid: Other M gameplay trailer.

Metroid Manual
"These move in groups and can pass through walls and rocks. They are the weakest and a single blast of the normal beam will lay them flat."