Probably somewhere around 350 or more. There's about 320 described from
North America so far, but there's a lot of forms known but not described
yet.
check out
http://zoology.byu.edu/crandall_lab/crayfish/crayhome.htm
This is one of the most exhaustive source of crawfish info on the Web. It
has some really wicked photos (and links to other pages w/ good pics)of cool
crayfish, my favorite has to be the genus Barbicambarus from the Barren
River system- look like little hedgehogs! Much of the literature is spread
out and difficult to find, but two fun (and cheap!) crayfish books that have
recently come out include:
The Crayfishes of West Virginia (1995) Jezerinac, Stocker, and Tarter, Ohio
Biological Survey Bulletin 10.
The Crayfishes of Missouri (1996) Pflieger, Missouri Dept of Conservation.
Also, the American Fisheries Society was selling copies of their Common and
Scientific Names of Aquatic Invertebrates of the US and Canada: Decapod
Crustaceans for $10... pretty decent list (if a little dated- about 40 new
crayfish described since 1989 are not included).
cheers,
Dave
>i guess different species act differently.
>i brought some back from florida... very small red ones. they grew very
>quickly and were exceptionally destructive.
>btw... in north america how many species of crayfish are there?
>casper
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