The coastal beach towns of Costa Rica all enjoy the freshest sea food and everyone has their favorite local fish stand. In the Dominical area it depends if you want whole fish or already cut filets.
For whole fish you can go down to the beach in Dominicalito from the La Parcela Restaurant entrance and then drive to the right once you hit the beach. There you will find a little shack where most of the fishermen come in with their daily catch.
Here you can buy whole fish from the same place many of the re-sale vendors and restaurants buy it from for only a few bucks per fish.
If filleting fish is not you thing, then you can buy the already cut filets from the fish stand in the La Macha parking lot. This is right across from the La Parcela entrance in Dominicalito.
Here you can buy fresh sushi grade Tuna (Atun), Mahi-Mahi (Dorado), Sea Bass (Corvina), or Red Snapper (Pargo) all for around only $10 per kg or 2.2lbs. They usually have Shrimp (Camarones) and sometimes even Lobster (Langosta), but both of those are more expensive.
So if you live in the Dominical area or are just visiting; fire up the BBQ and enjoy some fresh fish tonight!!
