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Nagurus cristatus
It multiplies slowly, so it is kept as a collector's species rather than as a working cleanup crew.
Nagurus cristatus, described by Dollfus in 1889 from a Surinam holotype, is a small woodlouse now recorded across North and South America, Southeast Asia and Oceania, and treated as an alien in Europe: a classic tramp species. Adults are only 4-6mm, grey to brownish-grey. The specific name cristatus means crested, and under good light a subtle ridging shows on the back; it is far less dramatic than a dwarf spiked isopod but gives the animal a texture that smooth dwarf species lack. The genus is rarely offered in the Western hobby, so it is collected for genus-level rarity as much as for looks. Care follows other small humidity-loving dwarfs: stable temperatures of 20-26C, a moisture gradient, deep leaf litter and gentle ventilation. Reproduction is slow, and a starter group can take several months before visible young appear, so pair it with a fast species such as dwarf whites if a working cleanup crew is needed straight away.
Source: WoRMS
The Dwarf Grey Isopod lives 1-2 years.
The Dwarf Grey Isopod grows to 4-6mm.
The ideal temperature for the Dwarf Grey Isopod is 20〜26℃.
Origin
South America (holotype from Surinam), now spread pantropically; recorded as alien in Europe
Lifespan
Sources: TC Insects Nagurus cristatus 'Dwarf Grey' (size, temperature, breeding) / WoRMS (distribution, alien records) / GBIF
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed)
Regulations may change. Always verify the latest information with the relevant authorities.
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1-2 years
Size
4-6mm
Temperature
20〜26℃
Leaf litter and rotten wood as staples with cuttlebone for calcium, plus small amounts of protein and vegetable
Hold 20-26C and keep it stable. Avoid windows, vents and unheated rooms in winter. Aim for a medium to fairly high humidity gradient.
A shallow enclosure suits this small species. Lay deep leaf litter with rotten wood and bark for cover, and keep ventilation gentle.
Leaf litter and rotten wood are the diet. Keep cuttlebone in permanently and add tiny amounts of protein and vegetable.
Harmless to people. Quiet and slow-moving, living in groups. It does not conglobate.
It breeds slowly and takes months to establish, so leave it undisturbed. Note that the trade name refers to different genera depending on the seller.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Dwarf Grey Isopod is 20〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Dwarf Grey Isopod is 1-2 years. With proper care and nutrition, they can live a long and healthy life.
Dwarf Grey Isopod typically reaches 4-6mm as an adult. Size may vary depending on care conditions and individual genetics.
Dwarf Grey Isopod feeds on: Leaf litter and rotten wood as staples with cuttlebone for calcium, plus small amounts of protein and vegetable. Aim for a balanced diet with appropriate feeding frequency.
The price of Dwarf Grey Isopod varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026