why do crayfish have strange behavior my crayfish sometimes
stands in a strange way for example it tucks its tail in then stands up
and shivers a lot.
Crayfish behavior has been widely studied and there are many reports
on the internet, and some interesting videos on You Tube, but I have
found nothing like what you describe. Here is one introductory site:
Good luck in learning more.
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Update: June 2012