Armadillidium Isopods for Sale UK

Armadillidium are the classic true pill bugs - the isopods that roll into a complete, sealed ball when threatened. Several genera can conglobate to some degree, but Armadillidium do it most completely and most reliably, and they're the animals most people picture when they think of a pill bug. That behaviour is part of the appeal, but it's the sheer variety that makes this one of the best genus collections on the site: nearly 50 species and morphs, spanning every point on the difficulty and price scale.

The colouration across the genus is genuinely impressive - from the bold black-and-white stripes of the Zebra to the vivid yellow-and-black spotting of the Clown Montenegro, the acid-yellow patches of the Gestroi, and the extraordinary variation of the Jelly Bean (St. Lucia locale), where individuals in the same colony range from deep burgundy through bright orange to yellow - all from the same species.

Everything here is captive-bred in the UK, dispatched Monday to Thursday by Royal Mail next-day, with a live arrival guarantee and a 20% overcount as standard.

Best Choices for Beginners

Magic Potion (A. vulgare) is the obvious recommendation - bulletproof hardiness, striking white, yellow and black spotting, and two lines to choose from depending on whether you want faster breeding (Japanese) or larger adults with more pronounced markings (American). The Vulgare Gem Mix and Granulatum Orange are similarly forgiving.

The Zebra and its Yellow and Chocolate morphs are a step up in visual appeal without being significantly more demanding - see our Zebra care guide for the detail.

For Collectors

• Armadillidium peraccae - a distinctive and increasingly sought-after species.
• Armadillidium nasatum - the peppered pill bug, and one of the few Armadillidium actually native to the UK.
• Armadillidium granulatum - large, granular-textured Mediterranean species, notably drought-tolerant.
• Jelly Bean - genetically variable, so no two individuals look alike. Our Jelly Bean care guide explains why.

Care Varies More Than You'd Expect

Armadillidium are broadly European isopods adapted to Mediterranean conditions - they want a moisture gradient rather than uniformly high humidity, and good ventilation over sealed enclosures. But within that, there's a meaningful spread.

The Zebra morphs and Clown Montenegro prefer it fairly dry - the Clown in particular wants a sharp wet-dry divide with mostly arid conditions and excellent airflow. The Magic Potion and Vulgare Gem Mix are among the most forgiving isopods in the hobby, tolerating anything from semi-arid to moderately humid. The Gestroi and Jelly Bean lean slightly more humid than their cousins, and the Granulatum Orange is notably drought-tolerant. The individual product listings cover this clearly for each species.

Our Armadillidium care guide covers the genus in full, and the humidity guide explains how to build the gradient they want.

Frequently Asked Questions

Do all Armadillidium roll into a ball?
Yes. Armadillidium are true pill bugs and conglobate into a complete, sealed sphere when threatened. Other genera such as Cubaris and Armadillo also conglobate, but Armadillidium do it most completely - if you specifically want the classic rolling behaviour, this is the genus to buy.

What is the best Armadillidium for beginners?
Magic Potion (A. vulgare) is the standard recommendation - hardy, forgiving of mistakes, visually striking and reliably prolific. The Vulgare Gem Mix and Granulatum Orange are similarly beginner-friendly. All thrive at normal UK room temperature without supplementary heating.

Do Armadillidium isopods need heating?
No. They're temperate and Mediterranean species, so standard UK room temperature suits them year-round in a normally heated home. They want good ventilation and a moisture gradient far more than they want warmth - and sustained heat above about 26°C actually reduces breeding.

Can you keep different Armadillidium morphs together?
Not if you want to keep your colour lines pure. Different morphs of the same species will interbreed and dilute over generations - so keep each morph in its own enclosure for any breeding project.

Will Armadillidium eat my plants?
They can. This genus has a reputation for nibbling live moss and soft plant growth, so if you're building a planted vivarium, factor that in and choose your plants accordingly. They're excellent in a bioactive setup otherwise.

How long do Armadillidium isopods live?
Typically 2-3 years, with some individuals reaching four under good conditions. A well-kept colony outlives any individual, so a healthy culture keeps going indefinitely.

All Armadillidium pair well with springtails in a bioactive setup. Our accessories range has everything you'll need for the enclosure, including leaf litter, cuttlebone and screw-in air vents for getting ventilation right without losing humidity control. New to the hobby? Start with our beginner's guide to keeping isopods, or browse the wider range in isopods for sale.