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 freshwater crayfish, koura, and eat scraps left over when the koura feed. They apparently cause no bother to the koura.
William found these at Poolburn Reservoir in central Otago.
Amazing!
The photo is CC-BY William Harland: https://inaturalist.nz/observations/341041723
Here are more photos of these crazy flatworms on #iNaturalistNZ: https://inaturalist.nz/observations?verifiable=true&taxon_id=868829&place_id=6803&preferred_place_id=6803
#invertebrates #flatworms #NaturalHistory #NZ #Freshwater #crayfish #crustaceans #nature #crayfish
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 https://www.cernunnosfoundation.com/nature-pictures/orconectes-rusticus/ #Crayfish
#NewSpecies!
New freshwater crayfish from #indonesia just surfaced:
Cherax bomberai
Treatment: https://treatment.plazi.org/id/03E3E33C-FFEC-FFB5-FE56-3EDEFB63FD7F
Publication: https://doi.org/10.3390/arthropoda3020010
#Arthropoda #CheraxBomberai
#FAIRdata
#science #OA #openaccess #biology #taxonomy #ecology #biodiversity #nature #wildlife #conservation #animals #invertebrates #arthropods #crustacea #crayfish #freshwater
Calculate and Visualise Flow Direction in QGIS

The Köpenick district of Berlin received its name thanks to a talking crayfish.
#Germany #folktale #folklore #crayfish
https://wiki.sunkencastles.com/wiki/The_Name_of_K%C3%B6penick_and_the_Large_Crayfish_of_Stralow
We got a new member of the family. This is a "vanilla lobster" (or crayfish) named "Opal". I've given him the nickname "pinchy". Hopefully he has a long fruitful life in our care.