{"product_id":"oniscus-asellus-orange-isopods","title":"Oniscus asellus 'Orange' Isopods for Sale","description":"\u003cp\u003e\u003cem\u003eOniscus asellus\u003c\/em\u003e 'Orange' is a selectively-bred orange morph of one of the most familiar woodlice in the British Isles — properly distinctive coloured stock of the common woodlouse, dressed in a warm orange palette that catches the eye against naturalistic substrate. The wild-type species is the bumpy-backed, slightly-skirted brown woodlouse you'd find under any decaying log or flowerpot across the UK; the Orange morph takes that familiar form and renders it in a properly photogenic warm tone, making it one of the more visually striking native-European isopods available to keepers.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eOniscus asellus\u003c\/em\u003e itself has a genuinely interesting story. It's one of the largest and most common woodlice native to the British Isles, Western and Northern Europe — described by Carl Linnaeus himself in the founding 1758 edition of \u003cem\u003eSystema Naturae\u003c\/em\u003e, and considered \"the archetypal woodlouse familiar to the general public\" in Britain (Wikipedia). The common name \"skirted isopod\" reflects the species' slightly out-turned lateral segments, which give the body a faintly flared, skirted appearance — a small visual feature that's particularly distinctive in the orange morph.\u003c\/p\u003e\n\u003cp\u003eOne charming detail about the scientific name: both halves mean essentially the same thing. \u003cstrong\u003e\"Oniscus\"\u003c\/strong\u003e is from Greek for \"little donkey\", and \u003cstrong\u003e\"asellus\"\u003c\/strong\u003e is Latin for the same — making the binomial name a charmingly redundant \"little donkey, little donkey.\" A small but properly memorable bit of natural history.\u003c\/p\u003e\n\u003cp\u003eThey sit naturally alongside other native and naturalised UK\/Western European isopods in the PostPods range — particularly the various \u003ca href=\"\/products\/porcellio-scaber-mix-isopods\"\u003ePorcellio scaber morphs\u003c\/a\u003e and the \u003ca href=\"\/products\/giant-italian-isopods\"\u003eArmadillidium vulgare 'Big Italy'\u003c\/a\u003e. Like Porcellio, Oniscus cannot conglobate — they're flat-bodied isopods that scurry rather than roll. Worth knowing if you're choosing between an isopod that rolls into a ball and one that doesn't.\u003c\/p\u003e\n\u003ch2\u003eQuick Care Summary\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eScientific Name:\u003c\/strong\u003e \u003cem\u003eOniscus asellus\u003c\/em\u003e 'Orange' \u003cem\u003e(note: the listing URL contains a typo — the correct species name is\u003c\/em\u003e asellus\u003cem\u003e, not \"casellus\")\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Names:\u003c\/strong\u003e Orange Skirted Isopod, Common Woodlouse 'Orange', Oniscus Orange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily:\u003c\/strong\u003e Oniscidae\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Native to British Isles, Western and Northern Europe; selectively-bred orange morph\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdult Size:\u003c\/strong\u003e Up to approximately 16 mm long × 6 mm wide — one of the larger common woodlice\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifespan:\u003c\/strong\u003e 2–3 years typical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Easy day-to-day; slow to establish initially\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 15–25°C — cool-tolerant Northern European species\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 60–75% with a moisture gradient — tolerates damper conditions than most isopods\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVentilation:\u003c\/strong\u003e Good — moist but not wet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConglobation:\u003c\/strong\u003e No — flat-bodied; scurries rather than rolls; slightly out-turned \"skirted\" lateral segments help deter predators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBehaviour:\u003c\/strong\u003e Active at night and early morning; mostly hidden during day; burrowing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreeding:\u003c\/strong\u003e Slow to establish but reliable once settled — not a prolific breeder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRarity:\u003c\/strong\u003e Uncommon — selectively-bred coloured stock\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat Makes Orange Oniscus Isopods Special\u003c\/h2\u003e\n\u003cp\u003eSeveral factors make the Orange morph a worthwhile addition:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe warm orange palette.\u003c\/strong\u003e This is the headline. A clean orange body — properly photogenic against dark naturalistic substrate, and quite a striking transformation of the familiar brown common woodlouse. Individual variation across a colony adds visual depth, while keeping the overall warm orange effect consistent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe \"skirted\" body shape.\u003c\/strong\u003e \u003cem\u003eO. asellus\u003c\/em\u003e's slightly out-turned lateral segments give the body a subtly flared appearance — particularly noticeable in good light. The common name \"skirted isopod\" reflects this distinctive shape, and it's amplified visually by the orange colouration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLovely etymology.\u003c\/strong\u003e \"Oniscus asellus\" — Greek \"little donkey\" + Latin \"little donkey\" — is a charmingly redundant binomial name. For keepers who appreciate the naturalist side of the hobby, it's the sort of small detail that makes a species memorable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNative British heritage.\u003c\/strong\u003e Unlike the many Mediterranean and tropical species in the hobby, \u003cem\u003eO. asellus\u003c\/em\u003e is a native UK species — the woodlouse most British people have actually encountered in their own gardens. There's something genuinely satisfying about keeping a beautifully-coloured morph of an animal that lives wild in your own region.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLinnaeus heritage.\u003c\/strong\u003e Described by Carl Linnaeus himself in the founding 1758 edition of \u003cem\u003eSystema Naturae\u003c\/em\u003e — proper scientific provenance going back to the foundation of taxonomic naming.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTolerates damper conditions.\u003c\/strong\u003e \u003cem\u003eO. asellus\u003c\/em\u003e favours damp habitats and handles higher humidity better than most isopods. Useful for keepers with naturally humid setups (vivariums, paludariums) where drier species would struggle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCrustacean heritage.\u003c\/strong\u003e Like all isopods, Oniscus is a crustacean — more closely related to marine shrimp and crabs than to insects. Quietly interesting context for what looks at first glance like just a coloured woodlouse.\u003c\/p\u003e\n\u003ch2\u003eHow Oniscus 'Orange' Compares to Other Isopods\u003c\/h2\u003e\n\u003cp\u003eIf you're choosing between coloured beginner-tier isopods, here's how the Orange Oniscus fits in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs \u003ca href=\"\/products\/porcellio-scaber-mix-isopods\"\u003ePorcellio scaber Mix\u003c\/a\u003e:\u003c\/strong\u003e Both are common woodlice familiar from UK gardens. \u003cem\u003eP. scaber\u003c\/em\u003e (Rough Woodlouse) is the small, rough-bodied scurrying species; \u003cem\u003eO. asellus\u003c\/em\u003e (Common Woodlouse) is the slightly larger, smoother-bodied skirted species. Both flat-bodied, both non-conglobating, both native — but distinct visual and behavioural species.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs Orange Porcellio scaber morph or similar:\u003c\/strong\u003e Different species. Where a Porcellio orange is the rough-bodied scaber palette shift, the Oniscus Orange is the larger, smoother, skirted-bodied alternative — different scale and texture, similar warm palette.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs \u003ca href=\"\/products\/giant-italian-isopods\"\u003eA. vulgare 'Big Italy'\u003c\/a\u003e:\u003c\/strong\u003e Both are large native\/naturalised European Armadillidae\/Oniscidae. Big Italy conglobates (rolls into a ball); Oniscus does not. Different behavioural appeal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs \u003ca href=\"\/products\/dairy\"\u003eDairy Cow (P. laevis)\u003c\/a\u003e:\u003c\/strong\u003e Both are larger non-conglobating beginner isopods. Dairy Cow shows distinctive black-and-white patterning; Oniscus Orange shows warm orange colouration. Different palettes, both peaceful and easy to keep.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse the full \u003ca href=\"\/collections\/oniscus-isopods\"\u003eOniscus collection\u003c\/a\u003e for more \u003cem\u003eO. asellus\u003c\/em\u003e options, or the broader \u003ca href=\"\/collections\/isopods-for-sale\"\u003eisopods range\u003c\/a\u003e for the whole catalogue.\u003c\/p\u003e\n\u003ch2\u003eSetting Up the Enclosure\u003c\/h2\u003e\n\u003cp\u003eA 6–10 litre plastic container with a secure lid suits a starter colony, with larger setups as the colony grows. Oniscus appreciates damper conditions than most isopods, so emphasise moisture retention while maintaining good ventilation. The \u003ca href=\"\/products\/3l-braplast-plastic-tub\"\u003e3L Braplast tub\u003c\/a\u003e works for small starter groups; larger colonies benefit from more space.\u003c\/p\u003e\n\u003cp\u003eDrill ventilation holes on opposite sides for cross-ventilation, covered with fine mesh. Good ventilation is essential — they like it damp, but not stagnant. Provide plenty of hides — cork bark flats, leaf litter, decaying wood, and small bark pieces. They burrow readily, so substrate depth matters. The warm orange colouration shows particularly beautifully against dark substrate and bark. Keep the enclosure dim and out of direct sunlight, since they're predominantly nocturnal. Browse our \u003ca href=\"\/collections\/accessories\"\u003eaccessories collection\u003c\/a\u003e for appropriate enclosures, vents, and other essentials.\u003c\/p\u003e\n\u003ch2\u003eSubstrate\u003c\/h2\u003e\n\u003cp\u003eBuild a moisture-retentive substrate suited to this damp-tolerant species:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOrganic topsoil base (pesticide-free) as the foundation\u003c\/li\u003e\n\u003cli\u003eSphagnum peat moss generously mixed throughout for moisture retention\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/flake-soil-1l\"\u003eFlake soil\u003c\/a\u003e mixed in for added nutrition\u003c\/li\u003e\n\u003cli\u003eCrushed limestone or eggshells distributed throughout for calcium\u003c\/li\u003e\n\u003cli\u003eDecaying hardwood pieces and rotting white wood incorporated throughout\u003c\/li\u003e\n\u003cli\u003eForest moss for humidity and grazing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe recommend a topsoil and sphagnum-based mix rather than coco coir. \u003cstrong\u003eSubstrate depth: 5–8 cm\u003c\/strong\u003e — Oniscus burrow happily and depth supports the nocturnal hiding behaviour.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTop layer:\u003c\/strong\u003e Generous hardwood leaf litter — \u003ca href=\"\/products\/large-magnolia-leaves-for-isopods\"\u003emagnolia leaves\u003c\/a\u003e, oak, and beech all work well, particularly the soft well-rotted material they prefer to feed on. Add cork bark flats and decaying wood for hides, plus a sphagnum moss patch on the moist side.\u003c\/p\u003e\n\u003ch2\u003eHumidity and Temperature\u003c\/h2\u003e\n\u003cp\u003eMaintain moderate to moderately-high humidity (around 60–75%) with a clear moisture gradient. Keep one side of the enclosure clearly damp with sphagnum moss and damp leaf litter, while the other side stays moderately humid with good airflow. Oniscus is more tolerant of damp conditions than most isopods — they favour properly moist habitats in the wild — but the gradient still matters, and you should never let the substrate become waterlogged.\u003c\/p\u003e\n\u003cp\u003eAs one PostPods customer noted about following the website's care guidance, getting moisture right is the key to keeping isopods successfully — and Oniscus is more forgiving on the damp side than most species, but still needs ventilation to avoid stagnation. \"Moist not wet\" applies even to this damp-tolerant species.\u003c\/p\u003e\n\u003cp\u003eTemperature should be 15–25°C — they're properly cool-tolerant as a Northern European native species, and UK room temperature works year-round without any heating support. They handle the cooler end of this range comfortably, which makes them well-suited to cooler homes and unheated rooms.\u003c\/p\u003e\n\u003ch2\u003eDiet\u003c\/h2\u003e\n\u003cp\u003eOniscus asellus are unfussy detritivores with broad appetites:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary diet (always available):\u003c\/strong\u003e Well-rotted hardwood leaf litter (oak, beech, magnolia), decaying rotting white wood, dried plant matter, lichen, mosses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVegetables (1–2x weekly):\u003c\/strong\u003e Yams, sweet potato, carrot, courgette, squash, root vegetables generally. Replace within 24–48 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFruit (occasionally):\u003c\/strong\u003e Small amounts of soft fruit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtein (1x weekly):\u003c\/strong\u003e Fish flakes, dried shrimp, dried daphnia. Browse our \u003ca href=\"\/collections\/accessories\"\u003eaccessories collection\u003c\/a\u003e for the full range of protein supplements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium (essential — always available):\u003c\/strong\u003e Cuttlefish bone, crushed limestone, oyster shell, eggshells. Important for healthy moulting — provide a constant source.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeeding approach:\u003c\/strong\u003e Maintain a base of leaf litter and decaying wood, supplementing with root vegetables (which they particularly enjoy), occasional fruit, weekly protein, and a constant calcium source. Remove uneaten fresh foods within 24–48 hours to prevent mould in the damper conditions they prefer.\u003c\/p\u003e\n\u003ch2\u003eBreeding\u003c\/h2\u003e\n\u003cp\u003eHonest reality: \u003cem\u003eOniscus asellus\u003c\/em\u003e is \u003cstrong\u003enot a prolific breeder\u003c\/strong\u003e. Colonies establish slowly and population growth is steady rather than explosive. This is normal for the species across all morphs — patience during the establishment phase is essential, and worth setting expectations on at purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBreeding basics:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFemales carry developing young in a marsupium (fluid-filled brood pouch) and release fully-formed live juveniles\u003c\/li\u003e\n\u003cli\u003eMultiple broods throughout a female's lifetime, but spaced out\u003c\/li\u003e\n\u003cli\u003eThe warm orange colouration develops as juveniles mature through successive moults\u003c\/li\u003e\n\u003cli\u003eA pure Orange colony breeds the morph reliably, with some individual variation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFor breeding success:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStable temperatures within range (18–22°C is ideal)\u003c\/li\u003e\n\u003cli\u003eA proper moisture gradient with damp-tolerant conditions\u003c\/li\u003e\n\u003cli\u003eAdequate calcium for breeding females\u003c\/li\u003e\n\u003cli\u003eRegular protein supplementation\u003c\/li\u003e\n\u003cli\u003ePlenty of cork bark and leaf-litter hides\u003c\/li\u003e\n\u003cli\u003eMinimise disturbance during establishment\u003c\/li\u003e\n\u003cli\u003eA larger starter group establishes faster and provides genetic diversity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe reward for patience is a properly attractive, distinctive colony of a native UK woodlouse in an unusual orange palette — a quiet, steady keep rather than a fast-expanding workhorse colony.\u003c\/p\u003e\n\u003ch2\u003ePair With Springtails\u003c\/h2\u003e\n\u003cp\u003eAdd a thriving \u003ca href=\"\/collections\/springtails-for-sale\"\u003espringtail culture\u003c\/a\u003e to any Oniscus setup. Springtails handle mould and microbial growth at a scale isopods can't manage — particularly important in the damper conditions Oniscus prefers, where mould can establish faster than in drier setups. They coexist peacefully with the Oniscus and form an essential cleanup partnership.\u003c\/p\u003e\n\u003ch2\u003eWho Should Buy Orange Oniscus Isopods?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKeepers wanting an unusual orange morph of a native UK woodlouse\u003c\/li\u003e\n\u003cli\u003eNaturalists who appreciate the British\/European species heritage\u003c\/li\u003e\n\u003cli\u003eBioactive setup builders with naturally damper enclosures (vivariums, paludariums)\u003c\/li\u003e\n\u003cli\u003ePatient keepers willing to wait for slow colony establishment\u003c\/li\u003e\n\u003cli\u003eDisplay enthusiasts wanting visible nocturnal isopods\u003c\/li\u003e\n\u003cli\u003eHobbyists building a European native isopods cluster\u003c\/li\u003e\n\u003cli\u003eCool-room keepers who don't want a heat-dependent species\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot ideal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImpatient keepers wanting fast, prolific colonies\u003c\/li\u003e\n\u003cli\u003eVery dry\/arid setups (they prefer damper conditions)\u003c\/li\u003e\n\u003cli\u003eAnyone wanting an isopod that conglobates — Oniscus doesn't roll (try \u003ca href=\"\/products\/giant-italian-isopods\"\u003eA. vulgare 'Big Italy'\u003c\/a\u003e or \u003ca href=\"\/products\/magic-potion\"\u003eMagic Potion\u003c\/a\u003e instead)\u003c\/li\u003e\n\u003cli\u003eKeepers wanting the most rare\/exotic-looking species\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRealistic Expectations\u003c\/h2\u003e\n\u003cp\u003eThe orange is the visual story. Set expectations toward the warm orange palette on a familiar woodlouse form. Individual variation exists, but the overall warm tone is consistent.\u003c\/p\u003e\n\u003cp\u003eThey don't conglobate. Like Porcellio, Oniscus is flat-bodied and doesn't roll into a ball. They scurry, burrow, and use their slightly out-turned segments to clamp against surfaces.\u003c\/p\u003e\n\u003cp\u003eThey're slow to establish. The single most important expectation to set. Initial colony growth is patient and gradual — give them time. Once established they're reliable, but they're never going to be the fastest-expanding colony in the room.\u003c\/p\u003e\n\u003cp\u003eThey want it damper than most isopods. The damper-tolerant nature is a real characteristic, not just an option. Drier setups stress them; damp-with-gradient suits them perfectly.\u003c\/p\u003e\n\u003cp\u003eThey look like a woodlouse, just orange. Like the Rust Porcellio and Big Italy vulgare, the Oniscus Orange isn't a dramatically exotic-looking species — its appeal is the clean warm colour on a familiar form. The natural-history depth (Linnaeus, native British species, charming binomial etymology) is part of the genuine character.\u003c\/p\u003e\n\u003ch2\u003eBuilding Your Setup\u003c\/h2\u003e\n\u003cp\u003eA complete Oniscus Orange setup needs a roomy enclosure, moisture-retentive substrate components, abundant calcium, generous leaf litter and cork bark hides, and protein supplements. Browse our \u003ca href=\"\/collections\/accessories\"\u003eaccessories collection\u003c\/a\u003e for everything you need — enclosures, ventilation, leaf litter, calcium (cuttlebone, limestone, oyster shell), and protein supplements.\u003c\/p\u003e\n\u003cp\u003eBrowse the full \u003ca href=\"\/collections\/oniscus-isopods\"\u003eOniscus collection\u003c\/a\u003e for more morphs of this species, or the broader \u003ca href=\"\/collections\/isopods-for-sale\"\u003eisopods range\u003c\/a\u003e for the complete catalogue.\u003c\/p\u003e","brand":"PostPods","offers":[{"title":"10","offer_id":55413048836478,"sku":null,"price":55.0,"currency_code":"GBP","in_stock":false},{"title":"20","offer_id":55413048869246,"sku":null,"price":105.0,"currency_code":"GBP","in_stock":false},{"title":"5","offer_id":55413048902014,"sku":null,"price":30.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/0707\/2294\/files\/Oniscus_Casellus_Orange_Isopods.jpg?v=1744041541","url":"https:\/\/postpods.co.uk\/products\/oniscus-asellus-orange-isopods","provider":"Isopods For Sale UK | PostPods","version":"1.0","type":"link"}