At any restaurant check out what they serve as sea bass or “mero”. Ask if they use mero basa before ordering. Do not order "mero" or ceviche if they use mero basa.
At Boga Boga they do not use mero basa.
Was at Sully once with friends, and was embarrassed when they served mero basa. It’s the cheap cultured fish, believe from Vietnam.
So, always ask.
Loved to go to Sully’s for the small langostinos. Delicious the way they made it with butter, garlic and paprika – or at least tasted like that. But after that happened to us, have not been back. May be time to go back.
The Spanish restaurants will serve good seafood – El Gallego (in front of the National Library on Cesar Nicolas Penson), the pricey Don Pepe.
New in Santo Domingo is Limao, on Virgilio Diaz Ordonez, just up from Multicentro La Sirena, before getting to Bravo. Dominican chef who worked in a Peruvian restaurant in Buenos Aires and has returned. They have delicious ceviche made with dorado.
Samurai has always been good for Japanese food with good fresh fish.
Nipau on Max Henriquez Urena has good Mediterranean food.
Meson di Bari in the Colonial City is famous for its stewed conch and crab.
Paellas are good at Cane on Av. Gustavo Mejia Ricart.
Fideua is delicious at Meson Espanol in Juan Dolio, just 40 minutes to the East.
Seafood is best closest to where it is caught… thus the suggestions for Samana.
In front of the cemetery you can watch the fish brought in from the fishermen and buy from them.