Phaz-Ing

A Phaz-Ing resembles a Phazon version of an Inglet, composed of Phazon instead of darkness. It can be killed by shooting it, using the Grapple Lasso, the Grapple Voltage, or using the Hyper Grapple. Touching them in Morph Ball mode results in Samus being covered and damaged by Phazon. According to the scan they prefer to stay in this liquid form. This is due to the fact that in the liquid form they are harder to hit and can't be easily killed using the Grapple Beam. Their only attack is charging energy to shoot a phazon blast. Samus can use the Hyper Grapple on them on Phaaze to quickly drain Phazon.

These creatures may or may not be the Ing's ancestors.

Logbook entry
Metroid Prime 3: Corruption: "Phaz-Ing bodies are weak to physical stress and can be easily pulled apart. These morphing blobs of Phazon often prefer to stay in puddle form and will only shift out to attack. Their ability to move over all types of terrain allows them to position themselves at a distance before assaulting with bursts of Phazon Energy."

Trivia

 * Though no official word from Retro exists, it is widely believed among fans that an untold number Phaz-Ings, who seem to originate from Phaaze, were onboard the Leviathan that crashed onto Aether and became the Luminoth's arch-nemeses: the Ing Horde. Theories imply that exposure to Dark Aether's Dark Energy and atmosphere rid the Phaz-Ings of their Phazon attributes and turned them into complete beings of darkness.