Not too far off topic Fish Joke :)

[Steph & Dave <caligula@curie.dialix.com.au>]

I got sent this strange fact in a list of others 'strange facts' and
thought it was appropriate for the group eg: its about small south
american fish :)

"If you urinate when swimming in a South American river, you
may encounter the candiru. Drawn to warmth, this tiny fish
is known to follow a stream of urine to its source, swim
inside the body, and flare is barbed fins. It will remain
firmly embedded in the flesh until surgically removed."

Steph

PS: Does anyone know if its true?