Wetlands do a lot of work. They provide cover for young fish, habitat for wildlife, and help trap sediment and slow runoff. Grass Carp can put that at risk by eating aquatic plants and uprooting plant beds.
Learn more: invasivecarp.ca/impacts/ecol...
#GrassCarp #Wetlands #GreatLakes #Fishing
Grass Carp can release hundreds of thousands of drifting eggs in flowing rivers. They spread through flooding, boat movement, and accidental release, and can damage wetlands by removing aquatic plants.
Learn more: InvasiveCarp.ca Report sightings: EDDMapS.org
#Anglers #GreatLakes #Fishing
Not all invasive carps cause the same problem.
Bighead Carp can reduce food available to native fish by filtering plankton, Silver Carp can become a jumping hazard for boaters, Grass Carp can remove aquatic plants and damage wetlands, and Black Carp can threaten mussels and snails.
DFO uses tools like electrofishing, nets, larval light traps, bongo nets, and eDNA to monitor priority waters for invasive carp. Different methods help detect different fish sizes and life stages.
More: invasivecarp.ca/surveillance...
#InvasiveCarp #GreatLakes #Ontario #EDDMapS
Grass Carp can be tricky, but one photo makes ID much faster: from above, Grass Carp show a clearly visible upper lip. ✅
Use the Two-Photo Rule for quickest verification: head from above + full side.
Learn more: invasivecarp.ca/invasive-car...
Report sightings: www.eddmaps.org
Grass Carp change as they grow, but key features stay the same. Look for no barbels, low-set eyes, dark-edged scales, and no keel along the belly.
Learn more: InvasiveCarp.ca
Report sightings: EDDMapS.org
#GrassCarp #InvasiveCarp #Fishing #GreatLakes #FishID #EDDMapS
Clear photos + GPS power rapid response. 📷 Head from above showing the upper lip. 🐟 Full side on a flat surface with a ruler if possible. Add date, waterbody, contact, and upload original files. Report at EDDMapS.org. More at InvasiveCarp.ca
That “minnow” in your bait bucket might not be just a minnow. Some baitfish can look like young Grass Carp at a glance. Never dump bait or bait bucket water into a lake or river.
invasivecarp.ca | eddmaps.org
#InvasiveCarp #Fishing #Baitfish #GreatLakes
Today is the last chance to fill out our Ontario angler survey!
Complete our quick online survey for a chance to win a $100 Bass Pro Shop/Cabela's gift card! This survey will be open until March 17th, 2026 and the winner will be drawn and announced on March 18th, 2026.
Click: bit.ly/4rx0sq1
Where they hide matters. Different invasive carp species use different habitats, from weedy shallows and backwaters to main rivers and riverbed zones. If you suspect one, take clear photos, note the location, and report it.
EDDMapS.org | InvasiveCarp.ca
#InvasiveCarp #Fishing #Boating #Ontario
Clean. Drain. Dry. Every time you leave the water. Remove plants/debris, drain all water-holding compartments, and dry gear before launching elsewhere.
DFO guide: bit.ly/3N0ilyv
Learn more about invasive carp: invasivecarp.ca
#CleanDrainDry #Boating #Fishing #Ontario
Thank you to everyone who joined our Grass Carp Information Session in Point Edward, ON! Special thanks to Ryan & Matt (DFO), Josh (Carp Fear Film), Jackie (MNR), and Friends of St. Clair River.
Learn more: invasivecarp.ca
Report sightings: eddmaps.org
📷 Grass Carp Information Session in Point Edward, ON (FREE)
📷 Special screening: Carp Fear Film (short film)
📷 Food & drinks included (plus booths, presentations, and a Q&A)
📷 Door prize: a YETI cooler
📷 Register: Scan the QR code or click: bit.ly/4jOGJPL
Point Edward, ON: Grass Carp Information Session (FREE) 🐟
Tue Feb 10, 2026 | 6–9pm @ Sarnia Yacht Club.
🎬 Carp Fear short film (Josh Duncan)
🍽️ Food & drinks
🎁 Door prize: YETI cooler
Scan QR to register.
Acoustic deterrents use underwater sound to steer fish. Because carp have swim bladders, targeted frequencies may help block their movement in narrow waterways. Learn more: www.invasivecarp.ca/surveillance...
#GreatLakes #InvasiveCarp #InvasiveSpecies
Some native and commonly caught fish can resemble juvenile invasive carp at a quick glance, especially small silvery baitfish and deep bodied forage fish.
Learn: invasivecarp.ca
Report: www.eddmaps.org
#Fishing #GreatLakes #InvasiveSpecies #FishID #EDDMapS
Silver Carp vs Bighead Carp. Silver Carp are usually clean, uniform silver and have a long, sharp belly keel that runs forward toward the throat. They can also leap from the water when startled by boat motors. Learn more at: invasivecarp.ca
#InvasiveCarp #SilverCarp #GreatLakes #EDDMapS
Black Carp love mollusks! Using pharyngeal (throat) teeth to crush shells. One fish could consume up to 20,000 lbs in its lifetime. Ontario has 41 freshwater mussel species (16 at risk), filtering ~40 L/day. Black Carp threaten mussels & snails if they reach the Great Lakes. #invasivecarp #fishing
Quick Grass Carp ID: from above, the upper lip is clearly visible. Use the Two-Photo Rule: head from above + full side = fastest verification. Learn more: invasivecarp.ca/invasive-car... Report: www.eddmaps.org #InvasiveCarp #GrassCarp #GreatLakes #EDDMapS
On the 11th day of #Carpmas, Grass Carp ate 40% of their bodyweight in aquatic vegetation!
By eating such huge quantities of plants, they can significantly alter the composition of habitat by reducing food sources, shelter and spawning areas for native fish.
On the 10th day of #Carpmas, Grass Carp gave us a guide on how to ID and report them: invasivecarp.ca/grass-carp-i...
On the 9th day of #Carpmas, Invasive carps reduced opportunities for birdwatching!
Poor water quality caused by Invasive carps could reduce suitable habitat for certain species and cause decreased participation in wildlife viewing activities, like birdwatching.
On the 6th day of #Carpmas, Black Carp reduced essential biodiversity in the Great Lakes!
Black Carp would compete for food and have negative impacts on native populations of fishes, turtles, birds, raccoons, otters and muskrats.
On the 5th day of #Carpmas, Silver Carp interrupted recreational activities!
Silver Carp can jump up to 3m out of the water when startled by boat noise, which can cause injuries while out on the water.
On the 4th day of #Carpmas, Bighead Carp outcompeted and caused decreased population sizes of native planktivores. species such as Alewife, Bloater, Cisco and Rainbow Smelt.
This will impact predatory fishes which consume those species: Yellow Perch, Lake Trout, Walleye, Large and Smallmouth Bass.
On the 3rd day of #Carpmas, Black Carp ate native freshwater mollusks (mussels, snails), many of which are species at risk!
#InvasiveCarp #InvasiveSpecies
#Carpmas! Grass Carp can eat ~40% of their body weight in aquatic plants each day and only digest about half. As few as 10 fish per hectare may cut wetland vegetation by ~50%, stirring up sediment and making water murkier in the process.
Visit InvasiveCarp.ca for Grass Carp ID tips, reporting guidelines, look alike species, and more background on impacts.
Reports can be sent to EDDMapS.org.
#GrassCarp #InvasiveCarp #InvasiveSpecies #GreatLakes #EDDMapS #Fishing
Common and mirror carp were introduced to Canada in the late 1800s, are now well-established across many waters, and are still considered non-native/invasive here. Now we’re working hard to prevent more invasive carps (Grass, Bighead, Silver, Black) from becoming established in the Great Lakes.
Clear photos + GPS power rapid response. 📷 Head from above showing the upper lip. 🐟 Full side on a flat surface with a ruler if possible. Add date, waterbody, contact, and upload original files. Report at EDDMapS.org. More at InvasiveCarp.ca
#GreatLakes #Fishing #Invasive #InvasiveSpecies