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Grass Carp

Grass Carp

Grass Carp are large herbivorous fish native to Eastern Asia that have been introduced to Virginia primarily for aquatic vegetation control. These impressive fish can grow up to 150cm in length, weigh up to 45kg, and live over 20 years.

Scientific Name: Ctenopharyngodon idella

Also known as white amur

Physical Characteristics:
  • These impressive fish can grow up to 150cm in length, weigh up to 45kg, and live over 20 years.

What to know

Habitat Distribution

  • Grass carp inhabit diverse water types from small ponds to large reservoirs and rivers, tolerating temperatures from 32-95°F.

Key Locations

  • Virginia records show grass carp present in numerous water bodies across multiple counties including Chesterfield (James River), Henrico, Fairfax (including Lake Royal), Augusta, Albemarle, and Franklin (Smith Mountain Lake).
  • In Virginia, productive waters include private ponds and small lakes rather than large river systems.

Specific Spots

  • Focus on areas with soft bottom substrate where they can forage for vegetation and invertebrates.

Grass Carp FAQ

Answers from onWater's species guide.

What flies work for Grass Carp in Virginia?

Effective fly patterns include size 12-16 beadhead woolly buggers (black/olive), size 14-18 beadhead hare's ears, size 18-22 smokejumper midges, CDC caddis patterns, and parachute hoppers in sizes 12-16. Tie patterns in multiple weights - heavy for deep/fast sinking, medium for slow descent, and light for suspension.

When is the best time to fish for Grass Carp in Virginia?

The best fishing occurs March through May and September through October when water temperatures range 50-70°F. Avoid fishing during summer months when water temperatures exceed 80°F, as mortality rates increase dramatically and feeding activity decreases.

How do you catch Grass Carp in Virginia?

Present flies 10-15 feet ahead of cruising fish, allowing them to sink into the fish's feeding path within 9 inches of their mouth. Use slow, gentle strips to create movement that mimics escaping food. Never set the hook aggressively - instead, slowly lift the rod to noon position and let the fish hook itself.

What do Grass Carp eat?

These opportunistic herbivores primarily consume soft, submerged aquatic vegetation including hydrilla, elodea, bladderwort, coontail, najas, milfoil, and various pondweeds, while avoiding woody plants like cattails and lily pads. Daily food intake can reach 50% of their body weight at 68°F and up to 120% at 72°F.

Where do Grass Carp live in Virginia?

Grass carp inhabit diverse water types from small ponds to large reservoirs and rivers, tolerating temperatures from 32-95°F.

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