This is a red swamp crayfish, also called Louisiana red crayfish. We saw this crayfish at the Bugs Alive exhibit this past Friday at the Milwaukee Public Museum.
Red swamp crayfish are native to the gulf coast states and the Mississippi river, but they got introduced to other places in North America like the Pacific states and Ontario, Canada, and they are causing some problems there. Some people like to eat red swamp crayfish. Scientists use it as a study animal.
This crayfish is a dark red color. It has four antennae and two big pincers.