Porcellio laevis “Milk Back”

Porcellio laevis “Milk Back”

Origin: Europe (Captive Bred)
Temperature: 18–26 °C
Humidity: 60–80 %
Adult Size: ~20 mm
Difficulty: Easy
Rarity: Common

Description:
Porcellio laevis “Milk Back” is a hardy, beginner-friendly isopod known for its smooth, glossy exoskeleton and striking milky-white patches on a grey base colour. They are prolific breeders, active, and excellent for bioactive setups or as feeder colonies.

Appearance & Behaviour:

• Adults ~20 mm, smooth and glossy
• Grey base with prominent white patches; contrast intensifies with maturity
• Cannot conglobate (roll into a ball)
• Active and fast-moving; bold, easy to observe
• Peaceful and social; compatible with other isopods
• Escape predators via speed and agility

Habitat & Care:

• Enclosure: At least 5 L for 10–15 individuals; small ventilation holes or mesh panels
• Substrate: 5–7 cm layer of organic topsoil, hardwood leaf litter, rotting wood, and bark
• Moisture: Maintain a moisture gradient; one side slightly damp, other slightly drier
• Temperature: 18–26 °C; ideal for standard UK room temps
• Humidity: 60–80%; misting and proper ventilation maintain balance
• Hides & décor: Hardwood bark, leaf litter, and rotting wood provide shelter and food
• Calcium: Cuttlebone, crushed eggshells, or similar sources for moulting and reproduction

Diet & Nutrition:

• Primary foods: Hardwood leaf litter, decaying wood, decomposing organic matter
• Supplementary foods: Carrot, sweet potato, courgette, fish flakes, dried shrimp, specialized isopod food
• Feeding frequency: Vegetables twice weekly; protein once weekly
• Remove uneaten fresh food after 48 h to prevent mould

Breeding:

• Prolific breeders: females produce 20–40 young every 2–3 months
• Juveniles emerge as miniature adults; no special care needed
• Stable conditions, adequate food, and moisture support rapid colony growth
• Excellent for bioactive cleanup crews and feeder colonies

Bioactive Use:

• Ideal for terrariums, vivariums, and substrate aeration
• Efficient at decomposing waste and maintaining substrate health
• Compatible with multiple other isopod species

Suitability:

• Perfect for beginners or expanding collections
• Hardy, forgiving, and visually attractive
• Active and entertaining for observation
• Excellent for bioactive setups and as feeder colonies

Care Level: Very easy; forgiving of minor mistakes and adaptable to moderate conditions.