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To: techdiver@opal.com
Subject: Re: movement through water
From: termstr@le*.co* (Term Structure Production)
Date: Wed, 11 Jan 95 11:24:01 EST
I was hoping that Richard Pyle, or perhaps someone else
who knows a thing or two about fish, would make this point.  
Since my erudite understanding of the subject comes
from the children's "hands-on" exhibits at such places as 
the American Museum of Natural History and various aquariums,
perhaps someone can correct any inaccuracies or perhaps
add some depth.  

The swimming motion of fish (except possibly the highly 
mutated "fancy" goldfish) is more complicated than just
flapping the tail back and forth.  The motion, similar
to that of a snake, is a sinusoidal wiggling of the 
entire body, as if the fish were moving along a standing
sine wave.  This is best seen in long narrow fish such
as eels.   

Philip Weissman

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