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#crayfish

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Public
Cathy Outlet

Found this amazing listing for an “absolute bastard” of a Florida #crayfish on #Kleinanzeigen (German Craigslist)

“Prefers to eat other, more expensive aquarium inhabitants. Destroys everything it comes into contact with. Likes to break out and destroy everything on its way to freedom. (…) is faster than you can react.

ABSOLUTE BASTARD.

Photo is from his solitary confinement, therefore somewhat pale and unfocused.”

Photo of the “absolute bastard” a small, blue Florida crayfish in an aquarium facing the camera. It’s listed for 5 Euros.
The original listing in German: Biete einen fast ausgewachsenen Florida Flusskrebs an. Frisst am liebsten andere, teurere Aquarienbewohner. Zerstört alles, mit dem er in Kontakt kommt. Bricht gerne aus und zerstört alles auf dem Weg zur Freiheit. Im Ernstfall ist er schneller, als Du reagieren kannst. ABSOLUTER BASTARD. Foto ist aus seiner Isolationshaft, daher etwas blass und unfokussiert.
Public
Matt Potter

Absolutely massive, lobster-like signal crayfish in the river Misbourne. These species were brought to the UK from North America to be farmed, but have escaped into the wild & infiltrated some of the UK’s wild rivers, where they are pushing out the smaller native species from their habitats.

#wildlife#crayfish#buckinghamshire
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Sunguramy :nb_lily:

Cambarus pecki, the Phantom Cave Crayfish. Fitting name for Halloween month, yes?

It was formerly in a different genus based on morphology, but molecular evidence moved it to Cambarus. Convergent evolution is interesting!

They are considered G1, or "Critically Imperiled" (NatureServe). It is only known to live in just three cave sites. All photography and research done with appropriate government permits.

#crayfish #cave #caves #caving #biology #ecology #evolution #invertebrate #nature #aquatic #photography

Can I call this #arachtober even though it's just an arthopod, not in arachnida? haha

Detailed close up image of the crayfish C. pecki, the phantom cave crayfish. It is a translucent white color that organs can be seen through, some which have reddish or brownish tinges. It is slender in appearance, its chelipods (front most 'legs' with claws/pinchers, similar to that of lobster or crab), are also narrow and elongate. This photo is a dorsal (top-down) view. Background is black.
Public
Lukas VFN 🇪🇺

Study of colorful #crayfish challenges theories of bright coloration as adapted phenotype phys.org/news/2024-07-crayfish

Correlated #evolution of conspicuous colouration and burrowing in crayfish royalsocietypublishing.org/doi

"The researchers conclude that bright coloration evolved incidentally due to random mutations and was maintained because there was no evolutionary pressure for it to fade—until crayfish found a need to blend into the mud."

photo of a red crayfish with blue legs
Public
Sunguramy :nb_lily:

Cambarus tartarus, the Oklahoma cave crayfish. This was a great find last week. Someone had just asked Danté if they were ever found out of water like some other species (it's common to move between pools and such), and the answer was 'nope, not that is known of'. About an hour later, and ta-da! This one was like, "I exist to prove we can!"

side view with backlighting of a white/clearish crayfish, that is cave adapted, and seeing on a damp rock which was at water's edge
#crayfish#cave#caving
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Reed Lindwurm

#MiamiCaveCrayfish proposed for #EndangeredSpeciesAct protections: fws.gov/press-release/2023-09/

This rare #crustacean species lives underground in the #BiscayneAquifer, in #MiamiDadeCounty, which is increasingly impacted by #SaltwaterIntrusion.

h/t to #CenterForBiologicalDiversity for helping to make this proposed rule happen through legal action: biologicaldiversity.org/w/news

FWS.govMiami Cave Crayfish | U.S. Fish & Wildlife ServiceBased on the best available science, the U.S. Fish and Wildlife Service is proposing to list the subterranean Miami cave crayfish as a threatened species under the Endangered Species Act with an accompanying section 4(d) rule. The Service is not proposing to designate critical habitat at this time. 
#SouthFlorida#Florida#EndangeredSpecies
Public
Larena Woodmore

We have two species of burrowing crayfish living in the areas surrounding our creeks. When the ground gets a bit wet they'll make chimneys around some of the entries to their burrows.

As they live underground it's rare to actually see one of these crays so my photo below was the first (and still the only live) one of this species, Engaeus tayatea, on iNaturalist.
#Crayfish #BurrowingCrayfish #Invertebrate #Tasmania #iNaturalist #Nature #Biodiversity

Photo of a small muddy-stick-coloured crayfish among muddy sticks. It's slender body is smooth with a slightly hairy tail. Its long claws open vertically so they can be opened while in its burrow.
Photo of a chimney above one of the entrances to a burrowing crayfish's burrow. The chimney is made by piling balls of mud around the hole, giving it a volcano-like appearance.
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