Question Mark Roach

Therea olegrandjeani

RoachintermediateHarmlessCommunal OK

No venom, no sting

Pet and feeder roaches are harmless to humans — no venom, no sting, and no meaningful bite. Wash your hands after handling.

About

A close cousin of the domino roach with a bold question-mark / comma pattern on the pronotum — another prized ornamental display species. Care is effectively identical to the domino: burrowing fossorial nymphs need a few inches of coco/sand substrate, adults are fast surface runners, and the colony breeds slowly. OMNIVORE feeding (chow + produce). Harmless.

Taxonomy

FamilyCorydiidae

GenusTherea

Native regionSouthern India

TypeTerrestrial

Temperamentactive, skittish

Size & growth

Adult size0.8-1 inch

Growth rateslow

Climate

Temperature75–88 °F

Humidity50–65%

Enclosure

Adult sizesmall bin for a colony

Substratecoco fiber / sand mix; nymphs burrow

Substrate depth2-3 inches

Water dishOptional

Feeding

Feeding modeOmnivore

Prey sizen/a (omnivore)

Adult cadenceroach chow + produce; light moisture gradient

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