Re: Not too far off topic Fish Joke :)

["Sean Murphy" <seancmurphy@hotmail.com>]

Yes, this is true there are several paracitic catfish in South America.  
They are actually paracitic on the gills of fish and are attracted to 
the ammonia trail that a respiring fish leaves.  They seem to confuse 
urine, or urea after it hits the water, with ammonia and follw the trail 
to the "source".  They don't really want to "infect" man since they will 
eventually die in the wrong host. 

Sean Murphy
Fisheries Biologist

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