Porcellio ornatus “Yellow”: Care & Enclosure Guide
Sep 27, 2026
Porcellio ornatus “Yellow” is one of the larger isopods in our range. Usable floor space matters more than height: several suitable shelters and accessible feeding spots are more useful than a tall, narrow container. This guide covers setup, care and colony growth.
- Temperature · guideline
- 20–25 °C
- Moisture
- Drier area plus a moist shelter
- What stands out
- Larger body size
Getting to know your isopods
Yellow is one of the larger Porcellio in the range. With patience, you can watch the animals exploring and feeding.
Cover is still essential. Arrange bark and leaves so they have sheltered areas on the way to their food as well.
Setting up the enclosure
Build your own setup
If you are choosing your own substrate and furnishings, our Assel Box with Quad Ventilation (11 L) provides the enclosure on its own. It measures 37 × 26 × 14 cm, is stackable and has four ventilation areas. Keep these clear on the shelf and fasten the lid on both sides.
Start with a set
Our Isopod Starter Set includes the same 11-litre enclosure, TropicSoil, sphagnum, feeding leaves/leaf mulch and cuttlebone pieces. An XL feeding dish and Mini insect drinker are included too. Cork and our isopod food are optional additions, not contents of this set.
Add substrate and leaf litter
Add several centimetres of loose, suitable substrate with decomposed leaves and white-rotted wood, then cover the surface with leaf litter. With the starter set, prepare the sphagnum according to its packaging and arrange the TropicSoil, leaves and moss to create a moist side and a less damp side.
Arrange shelters and a moist retreat
Our Cork Fragments 200 g provide cover. Choose suitable pieces and position them securely, leaving sheltered spaces underneath. Spread the shelters across different moisture levels and leave one corner accessible for watering.
If there is space beside the leaf litter and cork, Elephant Ear can add another sheltered area at ground level. This is a curved, woody pod, not a living plant. Choose a piece with enough room for your isopods beneath its curve and position it securely. At around 8–16 cm, the pod should not obstruct movement or the feeding spot.
Keep the feeding spot accessible
Position the feeding dish so you can remove it for cleaning without rearranging the shelters. Keep the drinker accessible too. Both are already included in the starter set, so you do not need an additional Carefree Bundle for this setup.
For Yellow, focus on floor space and roomy gaps beneath the cork. These larger isopods need a choice of shelters rather than a single narrow crevice.
Managing temperature and moisture
Use 20–25 °C as a guide. Keep one area moist and water other sections less heavily.
Check beneath shelters regularly to make sure the substrate is still moist enough. The entire enclosure does not need to be wet.
Ventilation, protection from direct sunlight and targeted watering form a sound starting point.
Food, calcium and a practical feeding spot
Keep leaves, wood and calcium available
Leaf litter and white-rotted wood provide food as well as habitat. Replenish them as they are consumed and keep a calcium source such as cuttlebone available. Cuttlebone pieces are already included in the starter set.
Portioning our isopod food
Offer our Premium Sowbug Food in small portions with the included wooden spoon, either dry or lightly moistened. The plant-and-mineral mixture contains herbs, vegetable ingredients, brewer’s yeast and algae-derived calcium. Check what has been eaten before adding more, and remove leftovers before they spoil.
Choosing a feeding dish
Our Isopod dish provides a compact feeding spot. The Isopod double dish keeps food and minerals separate. Choose the Isopod dish XL when larger animals or more isopods need room around the food. A larger dish does not mean you need to fill it with a larger portion.
The XL dish provides useful feeding space for Yellow. Portion size still depends on what your group actually consumes.
Choosing a dish and drinker together
Already have a furnished enclosure and want to add a feeding and watering station? The main difference between our Isopod Carefree Bundles is the dish:
- Isopod Carefree Bundle M: a standard isopod dish for a compact feeding spot.
- Isopod Carefree Bundle L: a double dish with two separate feeding areas.
- Isopod Carefree Bundle XL: an XL dish with more feeding space.
Each also includes a Mini insect drinker, a 30 ml bottle and three cotton pads. Enclosure, substrate and food are not included. Fill the drinker with water only, clean it regularly and replace the cotton pad.
Young isopods and a growing colony
A growing group needs additional floor space and cover. Monitor density and divide the colony when necessary.
Juveniles need sheltered moist spots even when adults are visible in drier areas. Leave small parts of the setup undisturbed during routine cleaning.
To start another culture, you can furnish an additional Assel Box with Quad Ventilation (11 L) in the same way. Label each separate group with its full species or form name so that offspring remain easy to identify.
Your quick care check
- Check moisture beneath leaves and cork; the moist retreat must never dry out completely.
- Check the dish, remove leftovers and refill according to consumption. Keep the drinker and cotton pad clean.
- Replenish leaves, keep ventilation clear and provide more floor space and shelters as numbers increase.
Do not release isopods outdoors. Wash your hands after maintenance. Before adding them to a terrarium, check that its climate and inhabitants suit the species.
Choosing between isopods
Like Porcellio scaber “Lava”, Yellow belongs to the genus Porcellio, but it is a different species. Porcellio laevis “Orange” is not a colour form of Yellow either. Yellow’s larger body makes usable floor space especially important.
Always check the full name when adding animals to a breeding group.
Questions about care
Is a tall enclosure especially suitable?
Usable floor space matters more. A wide enclosure with several shelters offers more options than a tall, narrow container.
Should all the substrate be moist?
No. Keep one retreat moist and other sections less damp. Make sure the moist area never dries out completely.
Can I use Yellow as a cleanup crew?
Only where the climate and other animals are compatible. A dedicated isopod enclosure makes care and breeding easier to monitor.
Further reading
These sources provide more information on the care described here. Temperature ranges are guidelines; always check conditions in your own enclosure too.
