Does the Expansus Isopod bite?

It is a harmless detritivore with no bite and no venom. It moves quickly but does not show aggression toward people.

How long does it live?

Its lifespan is estimated at around 2-3 years. Maintaining a suitable environment and diet helps it live out this full span.

Can I use the same care routine as other isopod species?

Unlike many humidity-loving species, it prefers a drier setup with good calcium availability, so avoid keeping the substrate as damp as you would for other isopods.

Is this species suitable for beginners?

It is considered suited to keepers with some prior experience. It's best to understand the basics, such as maintaining a drier environment and providing calcium, before bringing one home.

Is this species subject to any legal restrictions?

This species is not subject to CITES.

Expansus Isopod

The Expansus Isopod is a large woodlouse species originating from Spain, instantly recognizable by its broad body and distinctly flared side margins. It moves quickly and stays active, yet it has no bite or venom to worry about, making it a harmless detritivore that feeds on decaying leaves and wood. Unlike many humidity-loving isopods, it prefers a drier setup with good calcium availability, giving keepers a slightly different care rhythm to enjoy. With its striking silhouette and hardy nature, it appeals both to those newer to invertebrate keeping and to more experienced isopod enthusiasts.

View Expansus Isopod encyclopedia →

Find Expansus Isopod breeders(0)

Limited Time Offer

0% commission on your first sales!Register by September 30, 2026 and your first 2 sales are commission-free!

Breeder Wanted!

List on BreederDirect and sell directly to customers nationwide!

Free registrationNo monthly feesCommission on sales only

5 Transparency Standards You Can Trust

When listing Exotic Invertebrates, Breeders disclose the following. We guarantee transparency on growth stage and breeding unit.

Real Photos
Breeding Unit
Generation Info
Body Length (mm)
Country of Origin

All types Tarantula Arizona Blonde Antilles Pinktoe Indian Ornamental Orange Baboon Tarantula Curly Hair Tarantula King Baboon Gooty Sapphire Ornamental Green Bottle Blue Golden Blue Leg Baboon Common Pinktoe Goliath Birdeater

Browse all 249 breeds

Growth Stage

All Baby Juvenile Adult

Breeding Unit

All Male Only Female Only Pair Trio Colony

Filter

Price

Region

Has show resultsChampion titles

Attributes

WYSIWYG (Actual photo)

0 items

Sort by

Verified breeders wanted for Exotic Invertebrates

Breeders are signing up now ahead of launch. Subscribe to be notified when new listings go live.

Find breeders Browse the Exotic Invertebrates encyclopedia

Getting alerts is free with a member account. When new listings match your saved search, we'll notify you by email and in-app.

Browse other categories

Dogs Cats Marine Fish Coral Tropical Fish Goldfish Medaka Reptiles & Amphibians Small Pets Birds Insects

Verified breeders (preview)

奈

奈良岡陽子 Breeder

青森県

市

市川恵理 Breeder

埼玉県 / 1 listings

Are you raising exotic invertebrates?

Apply as a breeder

Expansus Isopod key facts

Care level: Intermediate
Lifespan: About 2-3 years
Size: About 2-3 cm
Temperature: 20〜26℃
Humidity: 50〜70%
Diet: Leaf litter base with a preference for protein and ample calcium.
Habitat: Strong ventilation, a large dry zone, limestone, and hides.
Temp & Humidity: Keep 20-26C drier with only one moist area.
Feeding: Offer generous protein and calcium.
Notes: Sensitive to excess moisture and slow to breed; harmless with no venom or bite.

TraitsisopodPorcelliolargedisplay

About Expansus Isopod

The Expansus Isopod is a large Spanish woodlouse known for its broad body and flared edges. It favors a drier setup and suits keepers with some prior experience.

7 things to know before welcoming a Expansus Isopod

1Prefers a drier setup
Unlike many isopod species, this one tends to dislike excess moisture. Keep the substrate only lightly damp and provide airflow with a moisture gradient across the enclosure so individuals can choose their preferred spot.
2Keep calcium sources available
This species requires significant calcium for shell formation during molting. Keep cuttlebone or crushed eggshell available in the substrate or feeding area at all times.
3Fast and active movers
These isopods move noticeably faster than many other species and can slip through small gaps in a loose-fitting lid. Choose an enclosure with a secure, well-sealed lid.
4Harmless, with no bite or venom
Despite its imposing appearance, this species poses no danger to people — it has no bite and no venom. Handling with bare hands is generally not a problem.
5A detritivore that helps clean up
As a detritivore, it breaks down fallen leaves, decaying wood, and leftover food. Because of this cleanup role, it is sometimes kept alongside other animals in a shared vivarium.
6Prepare the enclosure in advance
To avoid last-minute scrambling, set up the substrate, calcium source, and hiding spots such as decaying wood or leaf litter beforehand, and let the environment settle before introducing the isopods to reduce stress.
7A large species reaching 2-3cm
This is one of the larger isopod species, reaching about 2-3cm as an adult. Since it's considered suited to keepers with some experience, it's a good idea to be comfortable with isopod care basics before bringing one home.

Frequently asked questions about Expansus Isopod

Q.Does the Expansus Isopod bite?: A.It is a harmless detritivore with no bite and no venom. It moves quickly but does not show aggression toward people.
Q.How long does it live?: A.Its lifespan is estimated at around 2-3 years. Maintaining a suitable environment and diet helps it live out this full span.
Q.Can I use the same care routine as other isopod species?: A.Unlike many humidity-loving species, it prefers a drier setup with good calcium availability, so avoid keeping the substrate as damp as you would for other isopods.
Q.Is this species suitable for beginners?: A.It is considered suited to keepers with some prior experience. It's best to understand the basics, such as maintaining a drier environment and providing calcium, before bringing one home.
Q.Is this species subject to any legal restrictions?: A.This species is not subject to CITES.