it would make sense, especially given the most recent research, to actually just lump bowfin in with the gar forum (i know, may sound like blasphemy to some gar people). the group Holostei (bowfin and gars) has recently been resurrected in the phylogenetic circles, and therefore that group would be a natural one in terms of ancient fishes in the hobby too.
it should also be noted that bowfin are not "coldwater" fish...they are temperate fish. the issue with these terms is that in the tropical fish hobby, fishes that are temperate are often synonymized with coldwater fishes. this is not true of bowfin and many other fishes. the range of bowfin is actually quite broad, ranging from canada down to tropical regions of Florida. trout are coldwater fishes, bowfin are actually considered warmwater fish by scientific categorization.
all that being said, there are good points in above posts in that they don't have quite the following of other fishes, so putting them in a "native" fish forum works, but it would be more accurate to have a "gars & bowfin" forum.--
--solomon