From Wikitroid, the Metroid wiki

In Metroid Prime 2: Echoes, Inglets are small Ing that serve as the Horde's laborers. They are not well-equipped for combat, but can still shapeshift into the characteristic Ing blob form, as well as fire a small chunk of dark matter to defend themselves.

In Metroid Prime 3: Corruption there are Phazon versions called Phaz-Ing.