Phazon Metroid

The Phazon Metroid is almost identical to most Metroids, the only difference being they only feed on Phazon, which is somewhat annoying seeing as Samus's PED suit is Phazon-powered. These were only featured in Metroid Prime 3: Corruption so far. Should one latch onto you, you should switch to morph ball and lay a bomb to get it off.