Rusty crayfish are large and aggressive, with adults reaching a body length of 7.5 to 13 centimetres. They out-compete native species for food and space.
rusty crayfish - Encyclopedia of Life
WISC - Washington Invasive Species Council
New invasive crayfish found in Minnesota
Saskatchewan Fisher
My rusty crayfish, Aggie, in the front window of a nature center. Her job is to be an example of an invasive species (and eat lots of peas). : r/ Crayfish
Rusty crayfish (Faxonius rusticus)
Rusty crayfish kept at bay in Wisconsin
Rusty Crayfish
Rusty Crayfish - SLELO PRISM
Rusty Crayfish, (Orconectes rusticus)