From Wikitroid, the Metroid wiki

A Phaz-Ing is a Phazon version of a Inglet. It can be killed by shooting it, using the Grapple Lasso, the Grapple Voltage, or using the Hyper Grapple. It is likely that the Ing on Aether were originally Phaz-Ing, altered on a subatomic level to become beings of darkness rather than Phazon.

You can use the Hyper Grapple on them on Phaaze to quickly drain Phazon.

Phazon Creatures
Native to Phaaze	Leviathan • Jelsac • Liquid Phazon • Phazon Grub • Phazon Leech
Corrupted Creatures	Phazon Hopper • Phazon Nightbarb • Phazon Shriekbat • Phazon Puffer • Phazon Pillbug • Tangle Weed
Space Pirates	Aurora Unit 313 • Elite Pirate • Phazon Elite • Omega Pirate • Berserker Knight • Berserker Lord
Phazon Metroids	Tallon Metroid • Hunter Metroid • Fission Metroid • Phazon Metroid • Hopping Metroid • Metroid Hatcher
Leviathan Core Guardians	Metroid Prime • Emperor Ing • Mogenar • Helios • Omega Ridley
Born of Phazon	Phaazoid • Red Phaazoid • Ing • Dark Samus