Marbled Crayfish care guide
Marbled Crayfish (Procambarus virginalis) — minimum tank 60 L, temperature 18-25 °C, pH 6.5-8.
Overview
The Marbled Crayfish (Procambarus virginalis) is a unique parthenogenetic decapod crustacean — all individuals are female and reproduce clonally without males. The species was described from the European aquarium trade and is now recognised as a distinct asexual lineage related to the North American Procambarus fallax.
Taxonomy
- Family: Cambaridae
- Genus: Procambarus
- Scientific name: Procambarus virginalis
- Common synonyms: Marmorkrebs, Self-cloning Crayfish
Habitat
No natural source population is known; the species arose in captivity and has been introduced to multiple warm regions including Madagascar, parts of Europe and the Caribbean, where it has established highly invasive populations in lakes and rivers.
Tank requirements
- Minimum tank volume: 60 L (15.9 US gal)
- Adult size: 8-13 cm
- Temperature: 18-25 °C (64-77 °F)
- pH: 6.5-8
- GH: 5-20 °dGH
- Water flow: low
- Lifespan: 2-3 years
Diet
A generalist omnivore consuming detritus, plant material, small invertebrates and carrion. In aquaria it accepts sinking crayfish pellets, blanched vegetables, frozen bloodworm and brine shrimp, and will browse on most softer aquatic plants.
Compatibility
Hardy but aggressive and predatory; will eat slow fish, shrimp and small snails. Best housed singly in a species tank with plenty of caves and hiding places, as conspecifics can also be aggressive toward each other, particularly around moulting individuals. Plants other than tough rhizome species are damaged.
Breeding
Reproduces by obligate parthenogenesis — no males exist and every fertile female produces clonal offspring without mating. A single individual can establish an entire population, which is the main reason the species is invasive. Release into natural waters is illegal in the European Union and several other jurisdictions.
Conservation status
IUCN Red List: not formally assessed. The species has no native conservation status but is recognised as a serious invasive risk; many countries prohibit possession, trade or release.