All About Pets (West Chester, Cincinnati-Columbus Rd.)
Not mot any oddballs, but they did have a couple monsters last time I was in there. They also do trades on pretty much anything. Great selection of filters new and used with awesome prices. Only place in all of Cincy I've found a sump. They have a ton of tanks lying around for great prices as well. Best selection of driftwood and aquarium decor I've seen. Run by a guy and his wife, he seems to be very knowledgeable.
Aquatics and Exotics (Seven Hills, Hamilton Ave.)
Looking for a monster? Marine or freshwater, they have it here. Awesome selection of fish!!! They even have sharks, and I don't mean Bala... 10,000g setup with 2 real deal sharks. Very knowledgeable staff, and great prices on livestock but not on tanks. But really from Cichlid/Cichla to Lungfish and Dats. NO store in Cincinnati has their selection, at least none that I've found.
We also have Jack's Pets in almost every shopping center, a ton of Petsmarts...
Those are my 2 favorite LFS.