Mohéli National Park: A Protected National Park Landscape in the Comoros

Mohéli National Park is distinguished by its remarkable marine biodiversity and the presence of coelacanths, an ancient fish species once thought extinct that survives in the deep waters surrounding the island. The park also provides critical habitat for endangered marine species including dugongs, green sea turtles, and hawksbill turtles. On land, the park protects populations of Livingstone's fruit bat, one of the rarest bats in the world, along with two endemic bird species: the Moheli scops owl and the Moheli brush warbler. The combination of marine protection with terrestrial conservation makes this park exceptional among Indian Ocean protected areas.

Mohéli National Park traces its institutional origins to 19 April 2001, when it was established as Mohéli Marine Park, becoming the first protected area in Comoros history. The initial designation reflected international recognition of the marine biodiversity significance in Mohéli's surrounding waters, particularly the presence of coelacanths and important marine turtle populations. In 2010, the park was redesignated as a national park, expanding its mandate to include full terrestrial ecosystem management. A major expansion occurred in 2015 when the park boundaries were extended to encompass approximately three-quarters of Mohéli's terrestrial area. This expansion brought the total area to 643.62 square kilometers, making it the largest protected area in Comoros. The Lake Dziani-Boundouni area had already received international recognition as a Ramsar Wetland site in 1995, reflecting its importance as a freshwater habitat. The Comoros National Parks Agency serves as the operational authority for the park.

The landscape of Mohéli National Park encompasses remarkable diversity within a relatively small island territory. The marine portion features a prominent fringing reef that runs parallel to the southern and eastern coasts, enclosing a lagoon ranging from 10 to 60 meters in depth. Beyond the reef, the ocean floor drops to 100 meters, creating a diving and research zone of significant interest. Eight small mountainous islets rise from the ocean near the coast, providing rugged volcanic terrain that contrasts with the surrounding marine environment. On land, the terrain is characterized by rugged topography with deep stream valleys separated by steep ridges. The highest point, Mont Mlédjélé, reaches 790 meters and forms the volcanic backbone of the island. The western and southern facing slopes of this mountain retain the island's most significant forest cover, where deep valleys and ridges create a complex micro-topography supporting diverse habitats. The park also includes Lake Dziani-Boudouni, a freshwater crater lake covering 30 hectares in the southern lowlands, possibly fed by subterranean volcanic vents.

The ecological character of Mohéli National Park reflects its position at the crossroads of African and Malagasy biogeographic influences. The marine environment supports extensive coral reef communities within the lagoon and along the fringing reef, while seagrass beds provide additional habitat complexity. The 91 hectares of mangrove forest along the shoreline serve as critical nursery areas for fish and crustacean species. On land, the remaining forest on Mount Mlédjélé's slopes represents what remains of the island's original forest cover, most of which was cleared for agriculture and livestock. This forest remnant provides habitat for numerous endemic species, including the native trees Pterophylla comorensis and Khaya madagascariensis, valued for their timber. The plant community includes many additional tree species, shrubs, ferns, and orchids, with significant representation of Comorian endemics. The freshwater lake supports a distinct ecological community adapted to crater lake conditions.

The wildlife of Mohéli National Park includes species of exceptional conservation significance. The marine environment hosts coelacanths, the ancient deep-sea fish that represents a evolutionary lineage dating back millions of years. Shark species patrol the reef and open ocean areas, while humpback whales migrate through the waters surrounding the island. The park provides crucial habitat for marine mammals including eight dolphin species and two bottlenose whale species. Endangered marine reptiles include the dugong, green sea turtle, and hawksbill turtle, all of which depend on the park's coastal and marine habitats. The terrestrial fauna features Livingstone's fruit bat, one of the world's rarest bats, found only on Mohéli and Anjouan islands. Two bird species are endemic to Mohéli within the park: the Moheli scops owl and the Moheli brush warbler. The islets serve as seabird breeding colonies for masked booby, brown noddy, white-tailed tropicbird, lesser frigatebird, and great frigatebird. The broader terrestrial fauna includes additional bird species, reptiles, and insects endemic to the Comoro Islands.

Mohéli National Park represents Comoros' primary contribution to global conservation efforts and exemplifies integrated ecosystem protection in a small island context. The park's significance extends beyond national boundaries, providing critical habitat for species of international conservation concern including coelacanths, dugongs, and multiple marine turtle species. The Ramsar designation of Lake Dziani-Boundouni reflects international recognition of freshwater wetland importance. The presence of three endemic vertebrate species on such a small land area demonstrates the island's extraordinary biological significance. The park faces ongoing challenges from historical forest clearing and ongoing agricultural pressures, making active management essential for conservation success. The 2015 expansion to include three-quarters of the island's terrestrial area represents a commitment to comprehensive landscape-level conservation that acknowledges the interconnected nature of marine, coastal, and inland ecosystems.

Mohéli island and its national park exist within the cultural context of the Comoros, an Islamic nation with strong connections to Arab, African, and Malagasy cultural traditions. As the southernmost territory of the southernmost Arabic-speaking country, Mohéli occupies a distinctive position within the regional cultural geography. The local communities on Mohéli have traditional relationships with the marine environment that include fishing and coastal resource use. The park management must balance conservation objectives with the livelihoods of these communities, a common challenge in small island developing states. The freshwater lake, Lake Dziani-Boundouni, holds local cultural significance beyond its ecological value. The park's establishment reflected both national pride in the island's natural heritage and recognition of international conservation responsibilities.

The highlights of Mohéli National Park center on its exceptional biodiversity and comprehensive ecosystem protection. The coelacanth population makes this one of the world's most significant locations for this ancient fish species. The marine turtle populations, particularly green and hawksbill turtles, represent important nesting and foraging populations in the western Indian Ocean. The bat and bird endemics, including Livingstone's fruit bat and the two Mohéli-specific bird species, make the park globally significant for island biodiversity. The integration of marine, coastal, mangrove, forest, and freshwater crater lake habitats within a single protected area provides a model for island ecosystem conservation.

The best time to experience Mohéli National Park aligns with the region's dry season, typically from May through October, when conditions are most favorable for outdoor exploration and marine activities. During this period, sea conditions are calmer and visibility for snorkeling and diving improves, making optimal conditions for observing coral reefs, marine turtles, and potentially coelacanths in deeper waters. The cooler, drier weather also makes terrestrial exploration more comfortable, particularly for hiking in the island's interior. The wet season from November to April brings higher temperatures and increased rainfall, which can affect trail conditions and marine visibility. Humpback whale migrations typically occur during the austral winter months, offering opportunities for whale watching. Visitors should consult current conditions and park access regulations before planning trips, as infrastructure and access may be limited on this remote island.