Among cases of invading freshwater molluscs, there are relatively few involving unionid mussels. Most of those are Sinanodonta woodiana, a habitat generalist whose host fishes are the globally invasive bighead, silver & grass carps. This case involves the swan mussel, a member of the same subfamily.

It’s #worldalgaeday and my most favourite of algae is the diatoms! Single-celled and microscopic, these algae are so important, storing carbon, making oxygen, cycling nutrients, providing food, and even helping innovations in science and medicine! #marineplankton 🦑

www.theguardian.com/world/2025/o... #restoration #toronto

Asian Openbill (Anastomus oscitans). Handheld video feeding on freshwater mussel. Usually feed on invasive Golden Apple Snail (P. canaliculata) but also freshwater mussels.
youtu.be/9drUjdmOgaM
#BirdsSeenIn2025 #Ipoh #Perak #Malaysia @birdsoftheworld.bsky.social @mybirdcards.com @ebrrh.bsky.social

There is no bright flash or loud bang, no sharp crackling sound. But the Potomac River has just been electrified, and moments later, dozens of stunned catfish rise to the surface, where biologists count them before the invasive fish come to and swim off.
marylandmatters.org/2025/09/27/f...

Alligator eating an armored catfish at Lake Apopka in Florida. Armored catfish are an invasive species, believed to have come from releases of aquarium fish into the wild back in the 1950's. This fish was about 2 feet long, and made a good meal for the gator!

1/🧵 Over the past decade, misinformation in the popular media & the opinion pages of some journals has promoted the claim that concern over species invasions is overblown, because "most invasions do not cause extinctions".

Here is a brief reminder of what scientific evidence shows...
#bioinvasions

Whether you're a resident, angler, boater, or water steward, you can use this new MSU field guide to brush up on aquatic invasive plants -- and become part of the solution to stop their spread: buff.ly/7dRGNFp

New episode of the Teach Me About the Great Lakes podcast is out! I joined a couple other invasive species folks to talk about the new-ish aquatic invasive species in the #GreatLakes region we think people should know about www.teachmeaboutthegreatlakes.com/113

The invasive American Signal Crayfish is driving the decline of the UK’s native White-clawed Crayfish.

Learn how data can guide management & control strategies in our final crayfish training webinar with Nicky Green on 11th November.

Sign up here:
🔗 www.eventbrite.co.uk/e/1208652485...

The lake sturgeon (a 100-year-living, 90-kg relic from the age of dinosaurs) is returning to Missouri’s rivers after near-extinction from dams and pollution. The revival of a keystone species and signalling broader recovery of the Mississippi basin’s river systems.
buff.ly/NJFBX6f
#ShareGoodNewsToo

A new Special Issue on aquatic invasions has just been released in NeoBiota. Read the editorial to gain an overview of all the papers: Invasions in aquatic systems.

Use this link:
neobiota.pensoft.net/article/1678...

#bioinvasions @neobiota.pensoft.net

"What the barnacle really does signify is that this incredibly pristine environment is starting to become vulnerable to invasive species"
www.cbc.ca/news/canada/...

A beautiful fall day at the Gault Open Doors event 2025 talking to the community about aquatic invasive species 🐟🌱
@picard-m.bsky.social #goldfish #invasivespecies #aquaticecology #tubenosegoby #roundgoby #gaultnaturereserve

Willow emerald damselfly

Lovely examples of how BUTTONS used to be made from the nacreous layer of these bivalves! Just take "hole punches" through the shells! #molluscmonday

Some amazing early-19th century fish illustrations, by Edward Donovan
The natural history of British fishes
www.biodiversitylibrary.org/bibliography...

New Publication in The Journal of Fish Biology!

"Hidden in the gut: Metabarcoding reveals overlooked predation by the invasive European catfish (Silurus glanis)"

onlinelibrary.wiley.com/doi/10.1111/...