Their name derives from the debug mode of Super Metroid, which refers to them as SBUG, possibly meaning "Small Bug". Whether this name is official or not is unknown, but no other name exists for the creature, official or otherwise. It is likely however that "Small Bug" is its true name, and "Sbug" is an abbreviation. This lifeform resembles both butterflies and Pirate Wasp Mothers. The Phazon Leech feeds on carrion and are unimportant life-forms similar to the Sbugs. However, they can be killed, unlike the Sbugs.