freshwater barracuda

http://fish.mongabay.com/species/Acestrorhynchus_falcatus2.html

http://www.****************/catalog_pages/wild/ctenolucius_hujeta.htm

http://species.fishindex.com/species_267acestrorhynchus_falcatus_freshwater_barracuda.html

http://www.thetropicaltank.co.uk/Fishindx/fwbarrac.htm

From what I gather from the information they should be kept in 90+ gallons. I know one site says less, but it's always good to be on the safe side, especially if you get more than one. Which I think is also what's generally recommended. FB's are definately cool fish, if you have the room. I saw about 7 at the pet store awhile ago and some people were interested in buying them so the guy fed them. It was cool watching them swoop in and pick off the feeder fish.

Also here is a link to a forum that likes to discuss things like barracudas, and stingrays, and gars, and bichirs, and everything scary looking or potentially dangerous. :)
 
AquariaCentral.com