Gulf of Guacanayabo
Coordinates: 20 ° 20 ′ 1 ″ N , 77 ° 42 ′ 39 ″ W.
The Gulf of Guacanayabo is a bay in the southeast of Cuba . The province of Camagüey , which is detached from the coastline of the province of Las Tunas , borders on it on the far northern edge . Most of the central section and the south bank of the gulf is occupied by the province of Granma .
The largest city and the most important port is Manzanillo in the province of Granma .