Famous for being at the river shore and one of the best views of the sunset, Boteco do Pará is a must visit. They have the best sea rays pastel (fried dough), always cold beer and great service. Try the shrimp with cheese as well - also amazing!
We also had the “isca de peixe” (a fish entry) and it was superb.
Make sure you arrive early as it’s always crowded.