The most unique factor of this national park is that this is the only Tanzanian wildlife sanctuary that is bordering to the sea. With the coastal hot and humid climate it displays varieties of mixed flora and fauna of both the marine and the mainland. The park hosts around 30 species of larger mammals, numerous reptiles, and a considerable numbers of bird species that attract to the bird lovers too. If you would escape to the Ocean nearby you can encounter various species of fish, Green turtles, Humpback whales (nyangumi) and dolphins (pomboo).

The eco-systems that are included in the Saadani National Park are the former Saadani game reserve, the former Mkwaja ranch area, the Wami River and the Zaraninge Forest. If you want you can take a stroll in one of the village existing in its surrounding area.

The information available state that, Saadani Game Reserve was consulted with the consultation of the elders of Saadani village and a good amount of compensation was paid for the loss of crop to them. Before being included in the National Park list, only the Zaraninge Forest was being managed by the World Wide Fund for Nature (WWF) with a goal to preserve the extremely high botanical diversity of one of the last coastal rain forests lasting in Tanzania. The Mkwaja area is the reminder of a large cattle ranch that has been run from 1952 to 2000. The presence of many dams and paddocks attest to the former existence of the ranch