Species · GBIF taxon 8979506
Rusty Crayfish
Faxonius rusticusAlso known as Rusty Crawdad, Rusty Crawfish
Rusty crayfish are highly aggressive freshwater crustaceans recognized by the dark, rusty-red spots on each side of their carapace. They use their oversized, robust claws to defend against predators, dominate native crayfish, and uproot vast beds of aquatic vegetation. Their rapid spread across North America has dramatically altered lake and river ecosystems by reducing food and shelter for native fish.
InvasiveFreshwaterAggressive
- diet
- Omnivorous (aquatic plants, algae, insects, snails, and small fish)
- family
- Cambaridae
- threats
- Water pollution, habitat degradation, and eradication efforts in invaded areas
- life Span
- 3 to 4 years
LC
Equipped with powerful claws that can deliver a painful pinch; handle with care if necessary.
Possesses large, powerful claws capable of delivering a sharp, painful pinch that can break the skin of careless handlers.
Pick up from behind the thorax to keep fingers out of reach of the claws, or use long forceps.- Identification: Look for the signature rust-colored spots on both sides of the carapace, just in front of the tail.
- Handling: Grasp the crayfish firmly but gently from the back of the carapace, just behind the claws, to avoid getting pinched.
- Prevent Spread: Never transport live crayfish between water bodies, and clean all boating gear thoroughly to prevent accidental introductions.