Thank you Snoopy. A fascinating use of Tapirfish - by measuring how they react to different levels of water quality.. There seems to be very little information about the Tapirfish in general. They also appear to emit much less power than the common "electric eel". regards Peter 2008/5/5 Snoopy <snoopy@xxxxxxxxxx>: > Dear PEter, > > sorry bout the delay...I was in Berlin for the long weekend. > > Here is something in German about the Tapirfish which is a smaller electric > eels. About 2/3 towrads the bottom of the page they mention that in fact > several water works use them to monitor the watrer quality: > > > http://www.wasistwas.de/natur-tiere/alle-artikel/artikel/link//08e5e65eb9/browse/5/article/fische-mit-aussergewoehnlichen-faehigkeiten.html?tx_ttnews%5BbackPid%5D=53 > > and > > > http://www.3sat.de/3sat.php?http://www.3sat.de/nano/cstuecke/32968/index.html > > English Google turned up this paper: > > > http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VMC-4932BDH-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=88b63da7c5125c8a4cc2c6a963a50d88 > > and > > http://www.springerlink.com/content/h733225533277v17/