One of our favorite things to eat in Costa Rica is fresh ceviche (Parcela Restaurant aka The Point and Ceviche Place next to Ventana Beach) and fish. YOu can get great fresh fish at the fish shop in Dominicalito (on your left side when coming from Dominical). The shop is located across the entrance from La Parcela restaurant. Its very inexpensive and delicious. YOu may also catch your own fish on one of the great fishing tours offered.
I first came to Costa Rica in 1998. I fell in love with the country right away for so many reasons. I have been coming, living and unfortunately never staying off and on since.