They're an ascetic order.
Lord Mahavir and Jain Religion:
http://www.cs.colostate.edu/~malaiya/mahavira.html
And I think the "knotty" problem you're having with the Fish is that "nude" or "naked" is "nudo", while "knot" is "nodo".
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"Neither can his Mind be thought to be in Tune,whose words do jarre; nor his reason In frame, whose sentence is preposterous..."
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