Helodranon' Antongila (Bay of Antongila), more commonly called Antongil Bay in english, is the largest bay in Madagascar. It is at the northern end of the east coast of the island and for administrative purposes it is within the autonomous province of Toamasina. The bay is about 60 km long and 30 km wide, and is formed by the Masoala peninsula on its eastern side. At the northern end of the bay is the island of Nosy Mangabe and the town of Maroantsetra. Toamasina (Masc. ... Masoala National Park, in northeast Madagascar, is the largest of the islands protected areas. ... Nosy Mangabe is a small (about 520ha) island in Antongil Bay about 2km offshore from the town of Maroansetra in eastern Madagascar. ... Maroantsetra is a city in Toamasina Province, Madagascar. ...

Coordinates: 15°45′S 49°50′E Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 1. ...