Possibly opening a seafood market in BR.

Just copy Tony's. Maybe specialize more in salt water (tuna, redfish, snapper, black drum) rather than catfish. Also shellfish such as crab and shrimp consistently. Additionally, sell a variety of oysters and advertise where each comes from.

Jumbo lump crabmeat, claw meat, crab claws, head on jumbo shrimp, peeled and deveined various size shrimp not having been previously frozen, oysters in and out of the shell with liquor, fresh fish including on the half shell, fresh and frozen crawfish tails, live and boiled crawfish ....

And no Chinese seafood.

Soft shell crabs & a good gumbo.

I do think it's needed.

Hope you have established connections to a supply chain for fresh product. Freshness at a good price is key.

And nothing from China as Gris Gris noted

if you want to observe a highly successful seafood market and eatery, come check out mandeville seafood. place is always packed.

As far as I'm concerned, anyone selling red snapper can eat a dick.

Yes , it's needed and I would frequent your establishment if you offer a variety of salt water fish.
Baton Rouge may not be the ideal location for a Joe Patti's style market, but damn I love that place.

allow me to order online and just swing by and pick it up

A high end seafood market would be highly successful in south BR. There are no truly upscale/high end seafood markets anywhere in Baton Rouge (assuming you don't count high end grocery stores like Whole Foods and Fresh Market that have a seafood counter), and one anywhere in Baton Rouge -- especially south Baton Rouge -- would print money.

As others have mentioned, specialize in salt water fish. Make sure you sell a good variety of the high end fish that can be hard to find in BR, like Chilean sea bass, halibut, etc. A wide variety of high end shell fish should also be a given, including some somewhat hard to find things like dungeness crab.

Someone else mentioned a variety of oysters with tags showing where they are from. This is a great idea. For example, sell some of the exotic/high end oysters varieties from the pacific northwest.

Probably more than any other food product, people want to know that the seafood they buy is fresh and high quality. When people visit seafood markets with a high end/upscale atmosphere, that sell the types of high end seafood that I've listed above, people assume that the seafood they are purchasing is fresh and of high quality. Therefore the first person who opens a truly high end/upscale seafood market in Baton Rouge will make a lot of money.