The National Park and Biosphere Reserve of Mananara Nord.
The Biosphere Reserve is located just north of the town of Mananara-Nord. The National Park is divided into two distinct parts. The largest portion of the reserve is located inland from the coast, and includes the forests of Verezanantsoro, southern and northern Ivontaka, and forests near the Anove river. The second, smaller portion of the reserve comprises the island of Nosy Antafana and the surrounding reefs.
The Biosphere Reserve covers approximately 140,000 hectares. The National Park covers 23,000 hectares plus 1000 hectares of marine park including the surrounding islands and reefs. This reserve constitutes the largest protected block of low altitude humid forest in Madagascar. The reserve is located in an area composed of mineral-rich hills (the granites of Antogil and the migmatites of Mananara). Between Anove and Antanambe, a sand belt occupies the littoral. North of Antanambe, the beaches become more scarce and isolated. Reefs line the coast and cause waves to break nearly 200 meters from the shore. The group of islands surrounding Nosy Antafana also hosts their own beautiful submerged reefs.

There are 16 species of reptile like the Nile crocodile (Crocodylus niloticus), Ithycyphus perineti, and Chameleo cucullatus.

 60 species of birds are listed, of which some are rare and endemic, like the scaly ground roller (Brachypteracias squaminger and B. leptosomus) or Euryceros prevostii.

This is the only protected area in Madagascar for the mammals Galidictis fasciata and Salanoia concolor. The lemurs are well represented, with diademed sifaka (Propithecus diadema diadema), ruffed lemur (Varecia variegata), indri (Indri indri) and the aye aye (Daubentonia madagascariensis). Dr. B Meier found the species Allocebus trichotus in the reserve. The existence of the broad-nosed bamboo lemur (Hapalemur simus) in the south of the reserve is probable, as is the presence of the Dugong dugon in the marine park