If you want to shift fry then you have 3 options, all dependent on what you raise.
You're either going for selling to locals through forums and classifieds, you'll need a good number of local people who would buy what you're producing. Needs to be desirable enough to stop people going to the LFS for them. Basically anything in fashion, apistos would fit this billing.
Next option is to sell to the LFS itself. You need to check 2 things for this, 1, that they want them, which they frequently won't, but there are some things that they will like to get their hands on, and 2, that they don't have a policy of not buying, some of the chains won't touch anything, quoting OATA policies at you.
Finally, get into shipping, opens you up to the wider audience, slightly more involved, but means that if you can breed the more exotic stuff then you can open to a wider audience.
Overall, start with a fish and see if people want it. Check classifieds for lots of sales of one type or another.