Porcellio scaber - the common rough woodlouse - is one of the best beginner isopods there is: hardy, prolific, cheap and endlessly forgiving. It's the familiar grey woodlouse found in gardens across Europe and beyond, and it's also the wild ancestor of a huge range of striking captive colour morphs. They want a simple setup with a deep substrate, a moisture gradient (they actually prefer things on the drier side), good ventilation, and a regular protein and calcium source. This guide covers everything you need to keep and breed them well.
As a Porcellio species, scaber is an active, surface-dwelling isopod rather than a roller, and one of the easiest entry points into the hobby. If you're brand new to keeping isopods, our beginner's guide to isopod keeping pairs well with this one.
What Are Porcellio Scaber Isopods?
Porcellio scaber, the rough woodlouse, is a terrestrial crustacean in the order Isopoda, originally native to Central Europe but now found across much of the world. In the wild it lives under bark, logs, stones and leaf litter in damp, sheltered spots. Adults reach around 1-1.7 cm, with an oval, segmented body, fourteen legs, and the slightly bumpy, matt texture that gives the "rough" woodlouse its name. Unlike pill bugs (Armadillidium), scaber doesn't roll into a ball - it's a fast, surface-active species that scurries for cover when disturbed.
The wild form is a utilitarian grey-brown, but scaber is the canvas for many of the hobby's favourite morphs - Lava, Orange Koi, Dalmatian, Spanish Orange, Calico and more - all selectively bred from this one adaptable species. They keep the same easy care whatever the colour.
How Do You Set Up a Porcellio Scaber Enclosure?
A ventilated plastic tub or glass enclosure with a secure lid works well, sized to the colony with room to grow. The basics are a deep substrate, a moisture gradient and good airflow.
Use a substrate of coconut fibre or organic topsoil with leaf litter and decaying hardwood mixed in, ideally 7-10 cm deep so they can burrow. Top it with a generous layer of leaf litter, add cork bark and other hides, and include a permanent calcium source. Scaber isn't fussy about its setup, which is a large part of why it's such a good starter species.
Temperature-wise they're a temperate species, so normal room temperature suits them - roughly 18-25°C, with no special heating needed in most homes. They tolerate a wide range, but avoid extremes of heat. Good ventilation matters: scaber actually prefers drier, well-aired conditions, and stale, overly humid air causes more problems than slightly dry air ever will.
How Much Humidity Do Porcellio Scaber Need?
Less than many isopods, and this is the one place the old "keep them damp at all times" advice gets it wrong. Scaber is one of the most moisture-tolerant species going, comfortable from temperate to fairly arid conditions, and it generally favours the drier end. The right approach is a moisture gradient: keep about a third (and no more than half) of the enclosure damp with moist sphagnum moss under the hides, and let the rest stay semi-dry to dry. The isopods then move to whichever zone suits them.
Mist the damp side as needed so it stays moist to the touch but never waterlogged, and give the dry side an occasional light spritz to keep a little moisture present. Get that gradient right and scaber more or less looks after itself - they're genuinely hard to kill, which is exactly why they're recommended for beginners.
What Do Porcellio Scaber Isopods Eat?
Like all isopods they're detritivores, so the staple is decaying plant matter - leaf litter and soft white rotten wood - kept available at all times. Around that base, offer:
- Vegetables. Carrot, squash, courgette, cucumber and similar, in small amounts, removed before they spoil.
- Protein. This matters more for Porcellio than most genera - scaber is notably protein-hungry, which fuels its fast breeding. Offer fish flake, dried shrimp, dried insects or a commercial isopod food a couple of times a week. Feed protein on the drier side of the enclosure, as it spoils fast in damp spots and attracts mites.
- Calcium. A permanent source such as cuttlebone, limestone or crushed eggshell, for healthy moulting.
They're enthusiastic scavengers and will eat almost anything organic, but the leaf-litter-and-wood base plus regular protein and calcium is what keeps a colony growing and breeding well. Remove uneaten fresh food after a day or two.
How Do Porcellio Scaber Isopods Breed?
Easily and quickly - scaber is one of the most prolific isopods in the hobby, which is part of why it's so cheap and widely available. They reproduce sexually, so a colony needs both sexes, and the female carries her fertilised eggs in a brood pouch (marsupium) until the young emerge as tiny mancae, miniature versions of the adults.
Given stable warmth, a good moisture gradient, plenty of food (especially protein) and calcium, a colony will multiply rapidly with no special intervention. Start with a reasonable group, keep them fed, and you'll soon have a self-sustaining population - so much so that scaber is a popular choice both as a bioactive cleanup crew and as a feeder for reptiles and amphibians. With the morphs, bear in mind that patterning varies from individual to individual, and offspring can range from richly coloured to nearly plain grey.
Why Keep Porcellio Scaber?
Scaber earns its place as a starting point for almost everyone. It's hardy and tolerant of beginner mistakes, breeds fast, costs little, works as both a cleanup crew and a feeder, and - through its many morphs - offers plenty for collectors too. If you want a forgiving first isopod, a productive bioactive custodian, or a colourful display colony that doesn't demand precise husbandry, P. scaber delivers on all three.
Frequently Asked Questions
Are Porcellio scaber good for beginners?
Yes - they're one of the best beginner isopods. They tolerate a wide range of temperature and humidity, forgive mistakes, breed readily and cost little, so they're hard to go wrong with.
What humidity do Porcellio scaber need?
Less than most isopods. They favour drier conditions and want a moisture gradient - about a third of the enclosure damp, the rest semi-dry - with good ventilation, rather than being kept damp throughout.
Do Porcellio scaber roll into a ball?
No. Unlike pill bugs (Armadillidium), scaber is a surface-dwelling Porcellio that runs for cover rather than rolling up when disturbed.
How big do Porcellio scaber get?
Adults reach around 1-1.7 cm, making them a small-to-medium isopod and a manageable, very active species to keep.
What do Porcellio scaber eat?
Decaying leaf litter and rotting wood as the staple, plus vegetables, regular protein (they're notably protein-hungry) such as fish flake or dried shrimp, and a permanent calcium source.
Do Porcellio scaber breed easily?
Very - they're one of the most prolific isopods in the hobby. Given warmth, food, calcium and a good moisture gradient, a colony multiplies quickly, which makes them popular as both cleanup crews and feeders.
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