depending on *where* they're getting them, i guess! The invasive species in Alberta is the northern crayfish. The native ones in my area are signal crayfish - but ironically, they've become invasive in Europe, Japan & elsewhere

There were several trout in this spot 😊 But what I got was this crayfish holding my little fly tightly 😅 #FlyFishing #Fishing #Hiking #Crayfish #Walking #Wildlife #Photography

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

Amazing 15th century illustrations Long thread on some images from the German 1491 Ortus Sanitatis from the University of Sydney Library @sydney.edu.au Source (do have a look !): digital.library.sydney.edu.au/nodes/view/1... @ebdonana.bsky.social I start with crayfish @drecrevisse.bsky.social

That’s a wrap on field season 2025! Check out some highlights from the 9 weeks spent on the St. Lawrence & Ottawa Rivers! 1/4

..and here it is in Ontario!😱

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

A Red Swamp crawfish (in NYC!) !

Today is Quintidi the 25th of Fructidor in the year 233. Fructidor is the month of fruitfulness. Today we celebrate crayfish.#JacobinDay More information on crayfish

The stalk-eyed Crustacea Cambridge, Printed for the Museum, 1895. (source: https://biodiversitylibrary.org/page/13885341) #nature #illustration #art

Turns out I had been carrying around a stuffy of a crawfish in my travel cooking kit for YEARS. Who knew?! Anyway, found the perfect plate for him.

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.

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...

Completed my annual trip to northern Wisconsin, continuing population monitoring of invasive rusty crayfish (Faxonius rusticus) that extends back to the 1970s. Populations remain down, at only ~25% of past peak abundances, with surprising catches of large native snails in our traps.

18th century illustration White-clawed crayfish Austropotamobius pallipes British Zoology 1776-1777 Source www.biodiversitylibrary.org/page/40862669

Mudbug Madness!🦞🦞🦞 www.newson6.com/story/68b190...

Good news: The white morph of F. propinquus still surviving in Lake Simcoe despite the rusty crayfish invasion and spread. But How long before it is extripated???!

THE MOON 19th tarot from the 78 card square-o tarot deck i made 5 years ago for my 20202020 ( @floatingworld.bsky.social ) daily drawing book where all cards first appeared in floatingworldcomics.com/shop/art-boo... watercolor and ink on paper-

Undesirables! It was disappointing to come across several of the highly invasive, alien, Red Signal Crayfish (Pacifastacus leniusculus) in the River Bure below Aylesham yesterday. Seems the local Otters are at least keeping them in check, though...

Rode Amerikaanse #rivierkreeft Red Swamp #Crayfish #nature #netherlands #photography #wildlife #natuur #fotografie #dutch #outdoors #hiking #canon #wildlifephotography

There are some recent nice papers on crayfish colors that may be relevant: doi.org/10.1093/jcbi... doi.org/10.1093/behe...

Very cool nature sighting for your feed: a North American River Otter (Lontra canadensis) munches on a Conchas Crayfish (Faxonius deanae). Observed from a safe distance, of course! 📷 philly96 on iNaturalist 📍 United States 🔗: www.inaturalist.org/observations... #ObservationOfTheDay

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.

🏖️ day

First record of the invasive Red Swamp crawfish (P. clarkii) in the Greater Toronto Area (in a large storm water pond). On iNaturalist; record and photos: DT Santhosh. This is the second recorded occurrence in Ontario and fourth in Canada. Red invasion is on!

Australian Crayfish family

A relief to add a new pilose crayfish site this week. This native species disappeared from the mainstem, low elevation Bear River in Wyoming between 1987 & 2007, replaced by the non-native virile crayfish (peerj.com/articles/5668/). Remnant populations are confined to higher elevation tributaries.

River Rudrón (upper Ebro basin, N Spain) has such an amount of calcium that it deposits on the bodies of invasive signal crayfish, Pacifastacus leniusculus. I think that if it wasn't for the molting this animals would become limestone statues

In case you forgot it is that time of year!: 🦞🦞🥳https://www.youtube.com/watch?v=8Kd0co4fOaA

Linear Cobalt Crayfish - (Cambarus gentryi). From Alabama and Tennessee. It burrows along margins of streams. Click to see entire photo.

Southeastern Prairie Crayfish (Procambarus hagenianus). Alabama and Mississippi. Builds extensive burrows in low lying fields.

Crayfish on a train. www.bluewin.ch/en/news/inte...

https://gacha.o0o0.jp/gp/archives/23574 『ケーブルちょっきんしようカニ2 feat.ザリガニ』2月再販予定。＼オレも切ってやるガニ／ "Cable Cutting Crab 2 feat. Crayfish" is scheduled for resale in February. \I'll cut it too, Crab/ #ガチャポン #gachapon

Otro cangrejo de río de color azul precipitadamente identificado como Procambarus alleni. No es imposible, pero tiene toda la pinta de ser P. clarkii, tanto en el Tornes como en el Pisuerga @diariodevalladolid.es mirad el post de abajo www.diariodevalladolid.es/valladolid/2...

😅🦞

Just noticed that a piece on saving the white-clawed #crayfish I did for #BBC Wildlife mag earlier in the year has been online for a bit. Mobilise, aquatic invertebrate fans! Maybe one for @bbcspringwatch.bsky.social gang too? www.discoverwildlife.com/animal-facts... #wildlife #bugsky #rivers

Leucistic Faxonius from VT (photo: fishbruh @ inaturalist)

Feelin' blue Red swamp crayfish, Procambarus clarkii, being so, so blue among blue crabs, Callinectes sapidus American bluesim in southern Spain Maybe kind of tribute to CCR (check! www.youtube.com/watch?v=Wo4f...)

This was the first potential barrier we checked this summer, and we immediately found a virile crayfish showing us some technique for climbing over the dam boards. Definitely not a barrier - virile crayfish abundant upstream of the diversion

Blessed to find this beautiful electric blue Faxonius virilis while sampling the St. Lawrence for my doctoral work! This is a fairly rare phenotype for this native North American species!

This summer, my lab is working to determine whether we can protect the rare, native pilose crayfish in Wyoming from the widely invasive virile crayfish. For example, do irrigation diversions work as barriers excluding virile from pilose habitat? So: what do we think of this prospective barrier?

This little guys’ antics are so adorable 🥰 hence my unsuccessful attempt at staying quiet 🤭 #Crayfish are but one species who call the river where I swim home. It saddens me that we so unthinkingly harm other creatures like this, especially when witnessing them at play 💙🦞 #SharedPlanet #Vegan #FTA

Invasive red swamp crayfish found in pond at DNR's Wolf Lake State Fish Hatchery in Michigan - announcement from @michigandnr.bsky.social content.govdelivery.com/accounts/MID...

Michele, crayfish hunting