Grass Carp
Grass Carp in Washington are large, herbivorous freshwater fish classified as a regulated invasive species. These Asian natives serve an important ecological role in controlling aquatic vegetation and are protected for this purpose.
Scientific Name: Ctenopharyngodon idella
- Easily distinguished from common carp by their torpedo-shaped bodies, lack of barbels around the mouth, smaller dorsal fins, and silvery-white coloration rather than the bronze-gold of common carp.
- Can grow up to 5 feet long and weigh over 99 pounds, with some specimens reaching 150cm and 45kg.
Fishing in Washington
Yakima River
Cedar River
Puyallup River
Snoqualmie River
East Passage
Cowlitz River
Naches River
Commencement Bay
Cle Elum River
What to know
Habitat Distribution
- Prefer large, slow-flowing or standing water bodies with abundant vegetation.
Key Locations
- Klineline Pond in Clark County.
Specific Spots
- Near vegetated areas and shoreline structure, shallow areas with abundant vegetation.
Grass Carp FAQ
Answers from onWater's species guide.
What are the best lures and bait for Grass Carp in Washington?
Plant-based baits like fresh grass clippings, corn, bread pieces, berries (especially mulberries and cherries when available), lettuce, and dough balls.
What flies work for Grass Carp in Washington?
Patterns imitating cottonwood seeds (Light Cahill or white dry flies), cattail seeds, small berry patterns, or vegetation.
When is the best time to fish for Grass Carp in Washington?
Most active during warm seasons (spring through early fall) when water temperatures reach 20-28°C. Avoid fishing during spawning period from late spring through summer (May-July) when water temperatures reach 18-30°C as they focus on reproduction rather than feeding.
How do you catch Grass Carp in Washington?
Sight fishing would be theoretically effective as they often feed just below the surface or in shallow areas with abundant vegetation. Requires stealthy approaches as they are extremely wary and spook easily from vibrations, noise, and sudden movements.
What do Grass Carp eat?
Primarily herbivorous, feeding on aquatic vegetation, submerged terrestrial plants, and occasionally detritus, insects, and invertebrates. They consume up to three times their body weight daily.
Fish smarter with real-time insights
Whether you're en route and conditions shift or you're looking for the best spot based on current flows, we enable you to make informed decisions on the fly.
See it in the app
Most maps show you water.
onWater shows you Grass Carp.
- 01 · Species map filter
Map every Grass Carp water
Pick Grass Carp and the map zeroes in on the waters they call home. No more guessing which lake holds them.
- 02 · Waterbody species
Tap any water. See what lives there.
Species, behavior and seasonal patterns for every lake, river and pond, before you leave the driveway.
- 03 · Angler Intelligence
Ask how to catch Grass Carp
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where Grass Carp are.
Open the map, filter by Grass Carp, and head to water that holds them. Download onWater and plan your next trip in minutes.
- Species map filter
- Angler Intelligence
- Fishing journal
Explore other species
Trout, bass, salmon, panfish and everything in between. Each guide unpacks the behavior, seasons, and tactics that put fish in the net.
No species information available.
Washington licenses and regulations
Explore nearby waters
Explore Washington waters
Top fishing waters
Popular Cities
Loading popular cities...
Smarter Fishing Starts in the App.
onWater Fish gives you everything you need to plan smarter, fish better, and own every trip from first cast to last.