• Origin Galaxy: Unknown
• Star System: Unknown
• Original Planet: Known only as "Brood-world"
• Habitat: .12 surface covered with water, tropical climate
• Gravity: 80% of Earth's
• Atmosphere: .90 Earth density, high oxygen content
• Population: Unknown

• Types: Insectoid
• Eyes: Two (2) on head
• Legs: Six (6), forelegs can be used as tentacles
• Toes: None
• Skin Color: Brown
• Hair: None
• Height: 8 ft. in length
• Special adaptations: Long tail divided at end into two stingers, transparent wings, sharp teeth, amor-like skin. Eggs are injected into living beings by the Queen. The hatched embryo metamorphoses its host's body until it becomes a young brood member.

• Type of Government: Absolute matriarchy
• Level of Technology: The Brood uses "space-whales" called Acanti as living starships. They have advanced bioengineering capability, and weaponry.
• Cultural Traits: Utterly savage, driven solely by hunger and procreation.
• Names of Representatives: The Great Mother, T'Creilee, Haeg'rill, Skur'Kll. Others identified by function titles; e.g., Clanmaster

Note: "Broodworld" was destroyed in X-MEN #166, but Brood members still exist on other planets.