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Madagascar Hissing Cockroach

Gromphadorhina portentosa

GromphadorhinaBlaberidae

beginner

Overview

The classic pet roach — large, slow, docile, and handleable, which makes hissers a popular first invertebrate and a school/education favorite. Keep a colony warm (75-90 F) with coco-fiber substrate and plenty of stacked egg-crate or cork hides. They are OMNIVORES: dry roach chow or grain-based feed plus fresh vegetables and fruit, with a protein source occasionally; hydrate with water crystals rather than an open dish. IMPORTANT: hissers climb smooth glass and plastic easily — use a tight lid, and a band of petroleum jelly around the rim is the standard escape-proofing. They are harmless: no bite, no venom. The trademark hiss is made by forcing air through abdominal spiracles, used in courtship and when disturbed. Females are ovoviviparous (carry eggs internally, give live birth to nymphs).

Husbandry Requirements

Temperature & Humidity

Temperature

75-90°F

Humidity

60-70%

Enclosure Sizes

Adult:10-gallon for a small colony

Substrate

Type:coco fiber; provide egg-crate / cork hides for vertical surface
Depth:1-2 inches

Feeding Schedule

Adult:dry roach chow + fresh produce 2-3x/week; water crystals or gel

Prey size: n/a (omnivore)

Quick Stats

Type

terrestrial

Adult Size

2-3 inches

Growth Rate

medium

Native Region

Madagascar

Temperament

docile, handleable

Behavior

Webbing
BurrowingNo
Water DishOptional

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