Metroids captured have now reached maturity A genetic flaw makes it susceptible to certain weapons for brief periods. Only its head is truly vulnerable: other attacks are a nuisance. Offensively, Metroid Prime has a number of natural and mechanical weapons at its disposal. These include Ultrafrigid Beam, Multi-Missiles, Snare Beams, and Particle Wave Projectors. Its massive strength and barbed carapace make it lethal in melee combat. Metroid Primes have the ability to regenerate loss tissue in a near instant and are mostly composed of living metal ,similar to Necronians Current number: 4.5 billion Metroid Primes