Bug-like creatures, Mellas 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. In Metroid: Other M, Mellas often emerge from Fly Pods resembling flaming red compounds. In the same game, there is a species called Himellas that strongly resemble Mellas, but have cold attributes instead of the heat-based creature. The resemblance in name and physiology suggest that Mellas are related to Himellas.
"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."
"They exist in small swarms. Chill them out with a shot of the Ice Beam."
- Mellows are possibly related to Mellas and Himellas, given their similarity in name, behavior and body structure (they all feature small limbs or none at all).
- Artwork in the Japanese strategy guide for Metroid: Other M implies that Mellas and Himellas are subspecies of Reo given the fact that their images overlap.
- The variations of these creatures found in Metroid: Other M have an attack similiar to one that the Reos in the same game use. However, instead of slashing Samus, they latch on and explode and it cannot be countered.