International Association of Astacology

For questions regarding the workshop, please contact Dr. Brooke Grubb at brooke.grubb@email.gwu.edu

Announcement: Workshop offered at IAA25 in New Orleans: Crayfish IUCN Red List Training and Assessments.
This workshop is open to researchers, conservation practitioners, students, and resource managers interested in crayfish conservation and species assessments.

Mississauga teen’s incredible invasive species discovery sparks rapid response at Lake Aquitaine Mississauga teen’s incredible invasive species discovery sparks rapid response at Lake Aquitaine.

Mississauga teen’s incredible invasive species discovery sparks rapid response at Lake Aquitaine | The Pointer share.google/jY8brzsnBI2q...
My brothers and I found one of these in the swamp land behind our house on Lake Huron. Normally, the crayfish we pulled out were a turquoise blue.

A flyer for the Invasive Crayfish Collaborative webinar on Tuesday February 24 at 12 PM Central time. Register for the webinar here: https://invasivecrayfish.org/events1/

Join the Invasive Crayfish Collaborative next Tuesday Feb. 24 at 12 PM Central for a webinar on all things crayfish risk assessments with John Bieber of Loyola University Chicago. Register here: invasivecrayfish.org/events1/

NEW crayfish book by Dr. Graham from UNC Presshttps://uncpress.org/9781469685731/crayfish-crawfish-crawdad/

www.astacology.org/FC_TOC.asp?u...

Get excited! NEXT IAA is in New Orleans and registration is open www.iaa25.com

The next crayfish world congress will be in New Orleans LA: www.iaa25.com

www.lsu.edu/blog/2025/12...

photo of Turkish Crayfish by Serge Sidorovsky, completely covered with invasive zebra mussels

this photo of a Turkish Crayfish on iNaturalist by Serge Sidorovsky is destroying me. please he needs to be warshed

Claw left by waterbii

Just discovered that the "yabby" that lives in the wetland of my youth is actually a freshwater crayfish endemic to only this little part of the world. Listed as vulnerable.

Glad we never ate them!

Also glad I have the opportunity to rehabilitate its local environment here.

#ozwild

aces.illinois.edu/news/where-c...

www.luc.edu/sustainabili...

YouTube video by KGET News Crawdad invasion of Truxtun Avenue

www.youtube.com/watch?v=oEEC...

Very rare bilateral colour mutation in a Rusty Crayfish from the Chagrin R. (photo by Sean Williams)

NEW Issue of Crayfish News is out! get it at our website (and become a member if you are not one already!)🦞!

Unauthorised land clearing impacted endangered crayfish, EPA finds A creek in northern Tasmanian known to be home to the endangered giant freshwater crayfish has sustained "serious environmental harm" from land clearing and earthworks, the Environment Protection Agen...

Fears for endangered Tasmanian crayfish species after 'unauthorised' earthworks

Last year TEPA (EPA) quietly issued a stop-work notice to an industrial company over "unauthorised" and "extensive" damage to waterways housing the endangered giant freshwater crayfish.

www.abc.net.au/news/2025-10...

IAA25 will have crayfish oral and poster presentations from around the world. Come get a taste of Louisiana with a crayfish boil, Cajun band, and airboat tours through the swamps. The IAA25 website with conference registration, hotel conference rate booking, and meeting information is coming soon

The International Association of Astacology's 25th International Symposium on Freshwater Crayfish will be held in New Orleans, Louisiana on 1-5 June 2026 at the Sheraton New Orleans Hotel.

YouTube video by News 5 Cleveland Rare crayfish found in Ohio

www.youtube.com/watch?v=fEVT...

Close-up of a bright orange crustacean, the Miami Cave Crayfish. The crayfish is viewed from the side, its whole body visible, while it sits on a rock. It seems to be looking towards the surface of the water.

We just sued to protect the Miami cave crayfish, a species under immediate threat from saltwater intrusion cause by sea-level rise, more frequent tidal flooding, and storms of increasing intensity.

By 2070, they may lose as much as half of all available habitat.

Learn more ➡️ bit.ly/4pU37dc

The Red Swamp Crayfish (Procambarus clarkii) This crayfish can travel across dry land to find new rivers to invade. It’s a major threat, known for damaging infrastructure with its burrows & carrying crayfish plague. The #GuardIAS project is tracking its spread.

Spotlight: The Red Swamp Crayfish (Procambarus clarkii) 🦞

This crayfish is a major threat, known for damaging infrastructure with its burrows & carrying crayfish plague. The #GuardIAS project is tracking its spread.

Learn more: guardias.eu #InvasiveSpecies

Something truly extraordinary. The remarkable rainforest Lamington Crayfish on its daily forest walk. Isn't nature remarkable!

Thousands of invasive crayfish trapped in Belper river The crayfish in Belper were handed over to the Environment Agency, which killed them by freezing.

This is insane. Do you know how much people in Sweden pay for these during late summer crayfish season?
www.bbc.co.uk/news/article...

Crayfish crackdown: American invader on the Dutch menu - DutchNews.nl As billions of invasive American crayfish continue damaging canals and other waterways around the country, the best of way of dealing with them may very well be to eat them, experts say. No less than…

No less than five species of invasive North American crayfish have made the Netherlands their home after they either escaped or were dumped into waterways here and elsewhere across the continent.

fisheriespodcast.podbean.com/e/323-the-ca...

Two of my main concluding slides in my presentation:

Pleased to have delivered a seminar on invasive crayfish to the MNR Lake Ontario Management Unit at the historic Glenora research station.