A fairly large freshwater crayfish on some muddy rocks (it moved into the water shortly after the photo and was fine).

Different angle of the same large crayfish on the muddy rocks.

This smaller crayfish was the first of many I saw. It's more orange and is in a puddle of water.

Went for a walk down by the river and found #crayfish! Also saw my first butterfly of the year, a mourning cloak, and the ospreys have returned to their nesting platform. The crayfish were much easier to take photos of.

What signs of spring are you seeing these days?

ICB's
"Life history responses of four invasive #crayfish #species under prolonged suboptimal temperatures"

Antonín Kouba et al
doi.org/10.1093/icb/...

"#Biological invasions are strongly shaped by temperature, especially in #poikilothermic #organisms..."

#science

Huge crayfish/crawdad scuttling scarily quickly along the bottom of a trout stream. Chonky. Wide and tall. A mini lobster. I looked on in awe and horror.

Chonky crayfish in the trout stream! 🌿
#crayfish

Are you familiar/connected with World of Crayfish?
world.crayfish.ro
Tons of data on disease distribution. Could be useful to you.
#diseaseecology #AIS #crayfish #invasivespecies 🧪

Seagull with crayfish #seagull #CRAYFISH #BIRD #bording #rideauriver

🦞It's time to shell-ebrate all of the claw-some #humane dissection alternatives! Especially this #crayfish model from Inside Out Science!🦞

#humanescience #humaneeducation #teachers #scienceeducation #putthelifebackinlifescience #science #lifesciences #anatomy #biology #scienceteachers #k12

#ModelMonday Learn all about our #crayfish companions with the Crayfish Model Activity Set available on The #Science Bank. 🦞

#humanescience #humaneeducation #teachers #scienceeducation #dissectiondoesntcutit #putthelifebackinlifescience #lifesciences #anatomy #biology #scienceteachers #k12

Loose gouache painting of an Everglades crayfish with a blue background

#gouache #crayfish #painting 🦞

A photo of the claw of a NZ southern koura crayfish. The claw is covered in lots of pink blobs with tentacles. These are a kind of flatworm specialised at living on crayfish.

One of the highlights of my day was when William Harland, a talented ecology undergrad here at #LincolnUniversityNZ, stopped by my office to show me his photos of temnocephalid flatworms. These distinctive squat tentacled flatworms live in colonies on NZ's […]

[Original post on mastodon.nz]

I made a silly ✋

I saw what I thought was an eaten carcass of one of my new crayfish.

It was a molt. She's fine.

I have kept shrimp for years, I SHOULD KNOW BETTER.

( #crustacean #crustaceana #aquariums #fishsky #fishkeeping #crayfish #fish )

A Festival of Amateur Natural History Thoughts taken from a conference titled: A Festival of Amateur Natural History. The 15th South. Yorkshire Natural History Day, Sheffield.

📄 A Festival of Amateur Natural History 🔍

Key insights from talks on Henry Seebohm, crayfish conservation, ancient wood pasture, golf course wildlife & more.

#NaturalHistory #Naturewriting #NatureGolf #Botanists #Crayfish #Sorby #Woodpasture #Habitats #GardenWildlife

@sorbynathissoc.bsky.social

The cost of claw loss: The consequences of #autotomy on #burrowing in an ecosystem engineer, the Slender Crayfish zslpublications.onlinelibrary.wiley.com/doi/10.1111/... #crayfish #ecosystemengineer #crustaceans @elissazcameron.bsky.social @amcell.bsky.social @wileyecology.bsky.social

Thanks @josiesouth.bsky.social for coming to talk to us about #Crayfish invasions in our external seminar! Lots of important take-aways about the health and social implications of changing #freshwater #ecosystems and the importance of sharing data 🎣

This is not a crab.
It’s a rusty crayfish — a freshwater bruiser that eats plants, evicts natives, and raises its claws like it wants the argument.
Be crabby if you want.
It still isn’t a crab.

Orconectes rusticus www.cernunnosfoundation.com/nature-pictu... #Crayfish #WaterBugs

Cherax bomberai, holotype male.

#NewSpecies!
New #freshwater #crayfish from #indonesia just surfaced:

Cherax bomberai

Treatment: treatment.plazi.org/id/03E3E33C-...
Publication: doi.org/10.3390/arth...
#Arthropoda #CheraxBomberai

#FAIRdata
#OA #taxonomy #ecology #biodiversity #nature #wildlife #conservation #animals #crustacea

Impact of #noise on the #behaviour and biochemical parameters of the #crayfish Cherax quadricarinatus and Cherax destructor - #OpenAccess zslpublications.onlinelibrary.wiley.com/doi/10.1111/... #crustaceans #stressresponse @uhl-lab.bsky.social @elissazcameron.bsky.social @wileyecology.bsky.social

The Brushnose Crayfish (Procambarus pubescens), named after the prominent setae (hairlike structures) on its rostrum.

#crayfish #invertebrate 🌍🧪

A New Crayfish Species Was Hiding in Plain Sight Among Common Aquarium Pets, Researchers Find Native to Indonesian New Guinea, the crustacean comes in two color forms and is a popular pet choice in Europe, Japan, the United States and Indonesia

"The lobster-like crustacean is a burrowing freshwater crayfish endemic to the Indonesian part of New Guinea. Specimens have large eyes and claws, and smooth bodies. The species comes in two color forms: blue and purple."
🌊🦐🦞🦀 #Crayfish #Crustaceans #Biology #Wildlife #Nature #AmazingCritters

The Name of Köpenick and the Large Crayfish of Stralow

The Köpenick district of Berlin received its name thanks to a talking crayfish.

#Germany #folktale #folklore #crayfish
wiki.sunkencastles.com/wiki/The_Name_of_K%C3%B6...

Redclaw farmer expands to meet restaurant demand as industry production falls The freshwater crayfish is becoming more popular in restaurants across Australia, but the industry faces challenges boosting production as more farmers retire. 

Redclaw farmer expands to meet restaurant demand as industry production falls #aquaculture #seafood #crayfish

Red claw farmer expands to meet restaurant demand as industry production falls Red claw is becoming more popular in restaurants across Australia, but the industry faces challenges with boosting production as more farmers retire. 

Red claw farmer expands to meet restaurant demand as industry production falls #aquaculture #seafood #crayfish

#crayfish

Crayfish, Crawfish, Crawdad Whatever you call them—crayfish, crawfish, or crawdads—these small crustaceans are a vital piece of the larger ecosystem, and though they're found nation...

#crayfish

uncpress.org/978146968573...

German folk tale "The Uncanny Crayfish at Quitzdorf". Drop me a line if you want a machine-readable transcript!

There is a rather dodgy crayfish living in the Schöpfs river.

#Germany #folktale #folklore #crayfish
https://www.patreon.com/posts/crayfish-and-134048172

🦞 339 Crayfish Saved!
The UK’s native white-clawed #crayfish is on the brink of #extinction due to invasive species and crayfish plague. This year, the #Environment Agency and partners rescued 339 individuals from a threatened #Nottinghamshire river.
Read more here: nottsbag.org.uk/2026/01/01/w...

A rusty crayfish (Faxonius rusticus) shot from the top down through the water as they face the left of frame between two smooth river rocks

Merry #crustmas Eve!
Rusty #crayfish - Faxonius rusticus
(Shot near Cincinnati 7-24-25) 🦞 #photography #wildlifephotography #wildlife #nature #animal #invertebrate #crustacean #crawdad #crawfish

A marbled crayfish.

The one, true #Crustmas:

Marmorkrebs, the marbled #Crayfish, which is an obligate parthenogen - literal virgin birth!

This is reflected in the scientific name, Procambarus virginalis!

marmorkrebs.org

A rusty crayfish (Faxonius rusticus) shot top down through the wafer as the crustacean faces the right of frame. They have a bit of a ripple just over top of them.

#crustmas
Rusty #crayfish - Faxonius rusticus
(Shot near Cincinnati 7-8-25) 🦞 #photography #wildlifephotography #wildlife #nature #animal #invertebrate #crustacean #crawfish #crawdad

A rusty crayfish (Faxonius rusticus) covered in molm at the bottom of a shallow river facing the top left of frame

#crustmas
Rusty #crayfish - Faxonius rusticus
(Shot near Cincinnati 9-8-23) 🦞 #photography #macrophotography #wildlifephotography #wildlife #nature #animal #invertebrate #crustacean #crawfish #crawdad

New #crayfish !!! These are CPO’s, endangered species!