With over 10,000 species of isopod to choose from, you might think picking one for your terrarium would be overwhelming. Honestly though — most species aren't suitable for home keeping. The deep-sea Bathynomus giants can reach nearly two feet long, live in the depths of the oceans, and have become famous for scavenging dead sharks on the seafloor (no, they don't actually hunt them — but the videos are still properly impressive). The 3,600 or so terrestrial species in order Oniscidea are properly the only ones you'd realistically want in a tank on your sideboard.
So how have we narrowed it down to a top 5? Popularity has played the biggest part — these are the isopods our customers keep coming back for. We've also added a couple of personal favourites that we think are just amazing for one reason or another. If you don't fancy going with the crowd, check out our companion piece on the 5 most underrated isopod species.
1. Dairy Cow Isopods (Porcellio laevis)
You might be surprised to know that Porcellio laevis was one of the earliest isopod species recorded in the UK — especially given that they're originally from North Africa. An archaeological dig of a 13th-century rubbish pit found one preserved in the waste, and notes from mid-1700s naturalists include early records of P. laevis in Britain.
Those early records were of the grey form of the species, but P. laevis has multiple colour morphs — including the piebald black-and-white patches that we call Dairy Cow Isopods.
Properly interestingly, P. laevis thrived in British cities until the railway came along. They lived on cow and horse dung, and found compost and dung heaps the ideal habitat. Once the railway meant fresh milk could be brought to cities (reducing the need for urban dairy cows), and horse traffic dropped as transport modernised, their numbers fell. They're still occasionally found in stately homes with compost heaps that have been around for hundreds of years.
In the rest of the world, especially their native North African range, P. laevis are abundant. They're properly easy to breed in captivity — meaning you can be sure that keeping Dairy Cow Isopods isn't harming any wild populations.
They're one of the larger species commonly kept as pets, making them a properly substantial part of any clean-up crew. Their evolution to break down large amounts of waste means they'll happily process anything organic in their enclosure. Also known as the swift woodlouse, they can have surprising bursts of speed — so plan on a decent-sized enclosure to give them room.
2. Panda King Isopods (Cubaris sp.)
Another black-and-white species, but this time a colour combination that's properly natural rather than selectively bred. Panda King Isopods are a Cubaris morph from limestone cave systems in Southeast Asia — among the most iconic premium Cubaris in the UK hobby.
Adults reach around 1.5-2 cm, with the distinctive panda-like black markings on a white base. Their cave-dwelling origin means they have specific care needs that set them apart from generalist isopods.
Since they hail from limestone caves, calcium availability isn't optional — they need a properly ready source at all times. A piece of cuttlebone, crushed eggshell, or a chunk of limestone will all help keep them happy. Browse our accessories collection for calcium options.
Want to start breeding something a bit more unusual? Panda Kings are properly one of the better premium Cubaris to learn on. They breed reliably under stable conditions and the offspring are genuinely some of the cutest babies in the hobby — what's more endearing than a tiny baby Panda King exploring leaf litter?
Since they breed reliably in captivity, you can be assured ours are all bred in the UK by us — no wild collection impact on cave populations.
3. Rubber Ducky Isopods (Cubaris sp.)
These are properly often the isopods that catch people's attention first. With those endearing little faces, bright colours, and chilled-out attitude, Rubber Ducky Isopods make great pet isopods. The bold yellow "head" markings give them their distinctive "rubber duck face" appearance — genuinely one of the most photographable isopods in the hobby.
They are a bit more of a challenge to keep than the species above this on the list, properly needing higher humidity, stable warmer temperatures, and proper ventilation to balance the two. If you're just getting into keeping isopods, maybe look at Dairy Cows or Porcellionides isopods first — but for keepers ready for a bit more of a challenge, Rubber Duckies are properly rewarding.
Once you have a thriving colony, they'll start to breed, and you'll have tiny little Rubber Duckies climbing over the wood and leaf litter of your enclosure. The babies don't have the full yellow head markings yet — those develop with maturation — but watching the colour come in over successive moults is genuinely one of the joys of keeping the species.
Originally discovered in 2017 in limestone caves in Thailand, Rubber Duckies are still a properly rare species in the wild. Be careful where you source your own — UK captive-bred stock from established breeders (like us) means you're not contributing to wild collection pressure on the original cave populations.
We also stock various Rubber Ducky variants and bloodlines, including Helios, Albino, and R13 (the Malaysian lineage). All share the iconic face but offer different visual character.
4. High Yellow Spotted Giant Isopods (Armadillidium gestroi)
Want an isopod that likes to hang out in plain view? A. gestroi should be on your list. These are properly great for display terrariums where you actually want to watch your isopods rather than just hoping to glimpse them.
The bright yellow spotted colouration against dark base markings means they're easy to spot among substrate and leaf litter. Combined with their substantial size (up to 20mm), they make a properly impressive part of any display setup.
A. gestroi is endemic to Sardinia and Corsica — properly Mediterranean island species rather than generic "Southern European." That island biogeography matters: they evolved in a specific ecosystem with characteristic temperature and humidity patterns. They thrive in slightly higher temperatures and moderate humidity, and they'll properly munch their way through plenty of leaf litter and food.
Browse the full Armadillidium collection for other species in the same genus.
5. Powder Orange Isopods (Porcellionides pruinosus Orange)
Powder Orange Isopods are properly one of the most useful clean-up crew species in the hobby. P. pruinosus is originally a Mediterranean/North African species, now cosmopolitan through human introduction. The "Powder Orange" variant is a striking selectively-bred colour line of the species.
Amazingly hardy and prolific breeders, they thrive when given a humidity gradient — one end slightly damper than the other — letting them choose their own preferred microclimate.
In the wild, P. pruinosus are found in properly more arid conditions than most isopods. This makes them a genuinely good clean-up crew option for Bearded Dragon and other reptile enclosures, as long as there's a damper area available (such as near a water bowl). They tolerate dry desert-style setups better than most isopod species.
For a standalone Powder Orange colony, keep them in a slightly humid enclosure with a moisture gradient, offer plenty of leaf litter and varied food, and you'll be rewarded with a rapidly breeding colony. They're properly one of the fastest-reproducing isopod species in the UK hobby.
How to Choose Between Them
If you're trying to decide which to start with, here's a quick comparison:
- For beginners wanting visible, hardy isopods: Dairy Cow Isopods or Powder Orange. Both are properly forgiving and reproduce reliably
- For beginners who want to step up the visual character: A. gestroi High Yellow Spotted Giants — easy enough to keep, dramatic enough to display
- For experienced keepers wanting premium morphs: Panda Kings or Rubber Duckies. Both need more careful husbandry but reward properly with personality and visual character
- For bearded dragon or arid reptile bioactive setups: Powder Orange. The dry tolerance makes them genuinely the right choice for these environments
For all the setup essentials — substrate, leaf litter, cork bark, calcium sources — browse our accessories collection. For a full setup walkthrough, see our guide to setting up and selecting your first isopods.
And if none of these quite scratch the itch, the 5 underrated species piece covers some of our personal favourites that don't always get the popularity they deserve.
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