Procambarus clarkii
•Red swamp crayfish are native to southern US
•Collected in Washington state in 2000
•Has been in Maine for as long as 15 years
–Brought in incidentally with illegal baitfish
–4 non-native crayfish species in Maine
Matthew Scott
There have been  numerous crayfish species introduced around the country. Usually from bait bucket or aquacultures escapes.  In this case it was stock contamination with baitfish.  Maine exotics – Orconectes obscurus, O. rusticus, Procambaus acutus, P. clarkii. About 15 species of crayfish have been documented to be found outside their natural range in the US.