Dwarf White Isopods (Trichorhina tomentosa) Tropical Isopod / Woodlouse Culture
Looking for the ultimate "invisible" clean-up crew for your bioactive terrarium? The Dwarf White Isopod (Trichorhina tomentosa) is the gold standard for high-humidity and tropical setups, prized for its relentless appetite for mould, waste, and decaying organic matter.
These tiny, soft-bodied isopods are the "secret weapon" of professional keepers, living almost entirely sub-surface to aerate soil and process waste where other species can't reach.
At EntoScapes, our Dwarf Whites are UK captive-bred and raised on our specialized nutrient-dense substrates to ensure they arrive ready to seed your ecosystem.
Explore the sections below for our biology-led guide on their parthenogenetic reproduction, their role in preventing soil stagnation, and why these tiny tropical specialists are the safest choice for cohabiting with delicate reptiles and amphibians.
- Neotropical Origins: Originally native to the tropical regions of Central and South America, these isopods are biologically adapted to the constant warmth and high humidity of the rainforest floor. Their global success in the hobby is due to their ability to thrive in any environment that mimics these "steamy" equatorial conditions.
- Appearance: T. tomentosa are very small white, oval, soft-bodied isopods that can grow to around 2-3mm and live for 2 -3 years. This species of isopod belongs to the family Platyarthridae which are characterised by having no external lungs, very small compound eyes, and cannot roll into a ball (conglobate).
- Parthenogenetic Power: Individuals in this species are all female and they reproduce asexually by parthenogenesis. One female can have up to 4 litters a year and can have between 25-200 babies per litter, which is great for starting a prolific colony within your set-up, but take care not to accidentally introduce these to other isopod colonies as they will quickly outcompete them!
- Unmatched Efficiency: These isopods are soil-dwellers, feeding on rotting wood, leaf litter, and organic waste in the substrate, thus they excel at breaking down "hidden" waste - underground root decay, buried faeces, and deep-seated mould. This behaviour is vital for bioactive setups as it naturally aerates the substrate, preventing "sour" or anaerobic pockets from forming. To keep a colony booming, we recommend seeding them into our Premium Bioactive Substrate.
- The "Safe" Cohabitant: Unlike larger, more "protein-hungry" isopods (like Dairy Cows), Dwarf Whites are completely non-aggressive. They will never bother a molting invertebrate or a sleeping reptile, making them the safest choice for delicate species.
- High Humidity: These prefer temperatures between 21-29˚C and a humidity range of 80-90%, making them ideal for tropical set-ups with damp, shaded areas.
- Small size requirements: Size of enclosure is not much of an issue with this species, but we suggest checking your set-ups substrate to monitor the colonies growth. We would like to note that although T. tomentosa are an excellent clean-up crew, this species can quickly cause infestations in set-ups they may not have been introduced to, outcompeting the other clean-up custodians for food and space.
- The "Soft-Bodied" Advantage: Because they lack the heavy, calcified armor of larger Armadillidium species, they are a safe, supplemental calcium snack for small frogs, geckos, and dart frogs without posing a choking or impaction risk.
- Colony Contamination: If culturing, keep this species by itself and use separate tools and wash your hands after dealing with them to avoid spreading them around enclosures. If adding to a set-up, start with a small colony and monitor their progression.
- Clean up Crew Buffer Time: We suggest adding any clean-up crew 7-14 days prior to adding other inhabitants, to ensure the colony has enough time to establish itself within their new environment.
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