Among the more delightful members of the set of all possible World’s X-est Ys, IMHO, is this 3 x 2.4 x 1.4 cm freshwater fishtank from Russian miniaturist Anatoly Konenko. It’s stocked with three tiny zebrafish and outfitted with matching tiny net and bubbler. There’s an English-language piece at The Daily Mail. [Thanks, Alan Dove!]