Powder Blue Porcellionides pruinosus
A cool-toned blue-gray morph with a distinctive waxy sheen — effortlessly elegant and exceptionally easy to keep.
Overview
Porcellionides pruinosus 'Powder Blue'are incredibly hardy, fast-moving detritivores that grow up to 1 cm in length. Known for their powdery steel-blue coloration, they are one of the most popular, beginner-friendly cleanup crews for bioactive reptile and amphibian terrariums. Excellent for bioactive vivariums, display cultures, and as a soft-bodied feeder for smaller reptiles and amphibians.
Habitat & Setup
Substrate mix: For best results, use Isopod Paradise Organic Substrate specifically formulated to support healthy colonies. If you would rather mix your own, we recommend a blend of 70% organic topsoil, 10% flake soil, 10% milled sphagnum moss, 8% organics(mushroom compost, earthworm castings and leaf litter) and 2% calcium
Hides & decor: Bark, rotting hardwood pieces, generous hardwood leaf litter. They are fast and will use hides primarily to regulate moisture rather than for long-term shelter.Cuttlebone for calcium source.
Moisture: Maintain a moisture gradient with roughly half the enclosure damp and half dry. P. pruinosus is highly adaptable — it tolerates both semi-arid and humid setups — but consistent moisture access is needed for healthy molting. Add springtails to manage mold from heavy feeding activity.
Diet & Feeding
Enthusiastic, wide-ranging feeders. When protein is offered, they respond dramatically — clustering over food almost like a swarm. Protein once per week is adequate; more frequent offerings speed reproduction.
✓ Feed These
- Oak & hardwood leaf litter
- Dried shrimp or fish flakes
- Carrot, squash, zucchini, sweet potato
- Rotting hardwood for grazing
- Powder formulas like Isopod Chow, Repashy Morning Wood, Bug Burger, etc.
Feeding frequency:Rotate foods on a weekly basis. Remove leftover food when food begins to mold. Leaf litter and rotting wood can remain as a continuous background food source.
Breeding & Lifecycle
One of the fastest-reproducing isopods in the hobby. Colonies build rapidly under good conditions, and the pied coloring produces variable, interesting patterns in the offspring. Females carry young in a marsupium and give live birth; mancae are immediately active and fast.
Mancae care: Juveniles emerge tiny but fully formed and active. Offer fine food on the substrate surface. Their small size makes them ideal food for dart frogs and small reptiles — plan accordingly if mixing with vivarium inhabitants.
Colony tips: A group of 20 can become a thriving colony within 3–4 months.
Powder Blue isopods look like they are covered in a soft, frosty powder because of a microscopic trick called "pruinosity"! They secrete a specialized waxy coating across their shells that scatters light, making them look matte blue. If they get wet or molt, this frosty look instantly vanishes, revealing a much darker, shiny grey body underneath until their new shell dries out and the wax returns.