Hi, need to ask you good folks on here.....what are feeder fish please? I've never heard of this term here in the U.K. and I keep coming across it so often here on the forum. Feeder fish for what, some kind of carnivorous fish or another equally voracious life form? Please do tell! I've come across one day old chicks that are bred/sold for feeding snakes/birds of prey and the like but can't think what one needs baby fish for......or am I barking up the wrong tree here and its a loosely used term for 'feeding and kick starting' a filter system? I'm baffled.