One of my favourite singles from Bo Diddley. Played on Kogar on Boss Radio 66 just now. The Rolling Stones used to do it calling it Hey Crawdaddy. Not to be confused with Doing the Crawdaddy also by Bo Diddley.
We call them Crayfish over here. I used to catch them but not with a line and pole but just with a jar. We didn't eat them.