Invisible Pulse Bombus are creatures encountered in Metroid Prime. Samus Aran will only encounter them in Quarantine Access B and Fungal Hall Access in the Phazon Mines, where they attack her. As their name suggests, they are invisible, requiring the use of the X-Ray Visor to target them. They are fought in the same way as a normal Pulse Bombu.
- Why the Pulse Bombu is invisible is unknown. It is possible that the Space Pirates, who use the Bombu for recon, gave them a cloak ability, or that their invisibility is a random Phazon mutation, as the only room the invisible Bombus inhabit is suffused with Phazon.
- Metroid Prime and Metroid Fusion: Prima's Official Strategy Guide erroneously referred to these beings as "invisible Scatter Bombus".
- They are one of the few enemies in the game that do not possess a Logbook entry, as they cannot be seen by anything other than the X-Ray Visor.