Red swamp crayfish
© Queensland Government
© Joaquim Gaspar Creative Commons
Red swamp crayfish are an aquatic species of cambarid freshwater crayfish, native to northern Mexico and south eastern United States.
You must not keep, feed, move, give away, sell or release into the environment. Penalties may apply.
You must report all sightings to Biosecurity Queensland within 24 hours.
- 5–12cm long.
- Weigh up to 50g.
- Usually dark red in the wild, and light red in aquaria.
- Claws and head are elongated.
- Small spines may be present on the sides of the carapace below the head.
- Rows of brightly coloured red bumps on the front and side of the first leg are characteristic to the species.
- Found in warm freshwater rivers and creeks.
- Native to northern Mexico and south eastern United States; have established in other countries as an invasive species.
- Have been seized from aquariums in Queensland.
- No confirmed spread to native waterways in Australia.
- Grow quickly, reaching maximum age around 5 years.
- Reproduce sexually, but new evidence suggests they may also reproduce by parthenogenesis.
- Snails, fish, amphibians and plants.
- Will outcompete native crayfish species if introduced into Australian freshwater ecosystems.
- Carrier of the destructive crayfish plague disease (Aphanomyces astaci—also prohibited under the Biosecurity Act 2014).
- Carrier of the crayfish virus vibriosis, and various species of worms that are parasitic on vertebrates.
- Burrowing can damage watercourses and crops.
- Red swamp crayfish are prohibited matter under the Biosecurity Act 2014. You must not keep, feed, move, give away, sell or release into the environment. Penalties may apply.
- You must not take any action reasonably likely to exacerbate the biosecurity threat posed by red swamp crayfish.
- You must take any action that is reasonably likely to minimise the biosecurity threat posed by red swamp crayfish.
- You must report all sightings to Biosecurity Queensland within 24 hours.
- Contact the Customer Service Centre
- Red swamp crayfish fact sheet (PDF, 172KB)
- Crayfish plague disease bulletin
- Last reviewed: 6 Sep 2021
- Last updated: 6 Sep 2021