No crayfish species are native to the CRB
(Hobbs 1989; Inman et al. 1998; Carpenter
2005), but one species, the virile crayfish
[Orconectes virilis (Hagen, 1870)], is widely
established in the UCRB (Johnson 1986, Hubert
1988; Carothers 1994, Blinn and Poff 2005).