Smallest Saltwater/Freshwater Fish

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are we talking smallest fish in the world? or smalles kept aquarium fish
 
if we are talking strictly gills and tails, i would trust oddball. but if you wanna know the smallest SW with a little bit of open mindedness its phytoplankton
 
Not sure. The smallest I've kept is a colony of Catalina gobys (Lythrypnus dalli) in a small chilled tank. References say they grow anywhere from 1.5" to 2". My 3 year old colony never passed the 1" mark.

catalina goby.jpg
 
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