Flying Ing Cache

In Metroid Prime 2: Echoes, an Ing Flying Cache was an airborne darkling used by the Ing to hide the Sky Temple Keys on Dark Aether. They had an innate cloaking ability and could only be seen using the Dark Visor. Samus encountered only 9 on Dark Aether (one holding each Key), though it is safe to presume that many more existed before the destruction of Dark Aether.