Gragnols only can attack by shooting small pulses of Phazon at their target. Unlike their adult form, they lack the ability to generate an energy shield to repel beam attacks. This disadvantage makes Gragnols vulnerable to all of Samus's weaponry.
- "Gragnols are vulnerable to most weapons, as they have not developed the durable exoskeleton found on adults members of the species. They often travel and attack in groups. If they sense a nearby threat to their hives, they will not hesitate to advance. Their offensive capabilities are underdeveloped, leaving the ability to fire pulses of Phazon energy their only form of attack." — Logbook "Gragnol" (Metroid Prime 3: Corruption)