yup. they're up at zimmerman's right now, and I see a variety of species on aquabid. they remind me of the marine dragonet fish. they're why I picked up the 40 breeder from petco for keeping the new sunnies until the 245 is set up. after I get the 245 set up I'll be using it for some darters.
maybe make a river tank with darters and small minnow species, otherwise you try a single smaller puffer species like redeye, congo, hairy, or a group of dwarf puffers.