what to put in a 29 gallon?

[nixer]

Supposedly fish will only get as big as there tank allows them to. As far as what type of fish blue gill, small/large mouth bass, and maybe a cat fish. I would stay away from any carp.

not always!

i seriously though i would do a nice colorfull sunfish.
a crappie might get too large around 14 inches
a perch would be cool but they get like 14 inches sometimes larger

alot of native fish get too large, but those are pretty much the most interesting fish i would keep in a tank that small.
now if you were talking 55 -75 gallon i would do a walleye.

also note that it must be of legal size limit to have it, so i would go catch a 10" largemouth bass. also bass can get like 18-20" and well into 15lbs or so