The main part of its mammal population is on the peninsula of Sahamalaza. For instance, it is the refuge of the blue-eyed lemur—the only primate in the world to have this distinctive characteristic—, which is critically endangered. Seven other species of lemurs live in the reserve. There you can see about twenty species of reptiles, eleven species of amphibians, and about forty different bird species, including the rare and majestic fish eagle, the coua, ibises, herons, etc.
The coral reefs are also rich in biodiversity as they have 200 species of coral and invertebrates and 170 species of fish. The Lagna and Ankanabe reefs are home to sea turtles, which lay their eggs on Valiha Island. In short, this is a park where you can see both land and marine animals during your trip to Madagascar.