Description
Heavily armored and incredibly powerful. They can spit fireballs and charge at Samus with devastating force. Their weak point is often difficult to hit due to their armor.
Phases
None. They have a single attack pattern.
Weaknesses
Missiles are crucial. Screw Attack can be highly effective. Vulnerable when exposing their underbelly or head.
Strategy
Zeta Metroids are a tough challenge. Their armor makes them resistant to frontal attacks. Try to get behind them or hit them during their attack animations when they expose their vulnerable areas (usually their underbelly or head). Dodge their fireballs and charges. If you have the Screw Attack, use it to deal continuous damage while invulnerable. Be prepared for a prolonged battle and use your Energy Tanks wisely.
Rewards
Further lava level recession, opening paths to the Metroid Nest.