EnvThes
動物
动物
animals
Crayfish – also called crawfish or crawdads – are freshwater crustaceans resembling small lobsters, to which they are related; taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea.
[source of definition ] http://en.wikipedia.org/wiki/Crayfish" , "[controlled by ] Mark Frenzel, 22 May 2013
crayfishes
US LTER controlled vocabulary