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The Rusty Crayfish were released into our waters by anglers (fisherman), who were trying to use them as bait. That allowed the crayfish to spread
They have very robust claws. The crayfish have dark, rusty spots on their shell. Male crayfish molt, or shed their shells, twice per year. While females, molt once a year. The crayfish usually lives for 3 to 4 years.
Rusty Crayfish are opportunistic eaters, meaning they feed on whatever food is available. They usually eat aquatic plants and invertebrates such as snails, leaches, clams, and aquatic worms. They also eat decaying plants and animals, fish eggs, and small fish.
The main way we can control the invasive species is to not use them as bait for fishing.
The invasive species learned to seek shelter better than than the native species in the area. They adapted quickly and learned to survive in their new habitats.
The rusty crayfish are hybridizing with the native crayfish. They are also decreasing the density of invertebrates. They're reducing the variety of the aquatic plants that the native species need for shelter and food.