smallest catfish

Pigmy Cories stay smaller than Neon Tetras... Ottos would probably be 2nd.

have a look at http://www.planetcatfish.com/core/index.htm for the pics (under cat e-log)

my south american bumble bee cat is a whoppin 1.25 inches and wont get much bigger. dont confuse him with the asian bumble bee though. i have one of those about 3.5 inches. and according to one website, the females get more like 6 "and much fatter.
the one thing the two kinds of bumblebees have in common, is you almost never see them. total wusses. night hunters i guess.
so if your buying them to look at them, the most you'll see of them is: in the bag, on the way home.