Keta Lagoon Protected Area and Coastal Wetland Geography in Ghana's Volta Region

The human history of Keta Lagoon begins with the migration of the Anlo-Ewe people from Notsie in central Togo in the mid-seventeenth century. After settling first at Anloga, these groups spread along the shores of the lagoon, establishing a network of small towns and villages that collectively framed the water body as the center of everyday life in Anlo land. Over time, fishing, salt-winning, boat building, and trade turned the lagoon into the economic backbone of the region.

Colonial administrators began systematic recording of high water levels at Keta from 1907 onward, when floods periodically displaced whole communities. Despite repeated appeals from local merchants and residents, the colonial government largely left responsibility for flood and erosion control to the inhabitants themselves, and the question of whose duty it was to protect the coast became a defining theme in Anlo-Ewe political life. Early attempts at coastal engineering, including a 1963 canal cut by Aryee of the Public Works Department, failed when the structure was swept away in a major flood. Salt production on the lagoon, meanwhile, expanded from the early eighteenth century into a major economic activity tied to the harmattan dry season.

In the modern era, restoration, conservation and a major defense effort reshaped the lagoon. In 1992, the Keta Lagoon complex was inscribed on the list of Wetlands of International Importance under the Ramsar Convention, with reference number 567. The Keta Sea Defence project, begun in 1999, aimed to limit coastal erosion and flooding, including through a canal that allows excess water to drain into the sea and roads built across shallow eastern waters to support construction. BirdLife International designated the lagoon an Important Bird Area, recognizing its global significance for migratory waterbirds. At the same time, traditional spiritual practices and festivals such as Tagbaza continued to mark the lagoon as a living cultural landscape, even as fishing effort, mangrove cutting, and shifting rainfall patterns reshaped its ecology.

The Keta Lagoon complex represents one of the most ecologically diverse coastal wetland systems in West Africa. It blends saline open water, brackish shallows, freshwater inflows, mangrove swamps, and seasonally flooded grasslands, supporting a wide range of aquatic and semi-aquatic life. The mangrove fringe is particularly important, serving as nursery habitat for fish and shrimp and as a structural buffer against coastal erosion.

Vegetation around the lagoon reflects the interplay of salt and fresh water. Red and white mangroves line much of the shore, while raffia palms and aquatic reeds thrive in fresher, less saline margins where rivers enter the lagoon. Coconut trees are common along the coastal strip, and patches of dry coastal vegetation occupy the sandy barrier that separates the lagoon from the sea. Together these plant communities underpin the productivity of the entire system by stabilizing sediments, recycling nutrients, and sheltering juvenile fish.

The lagoon's brackish environment makes it a transition zone between marine and freshwater habitats. Seasonal pulses of marine water through tidal inlets and the engineered canal allow marine fish to enter and breed in calmer inland waters, while rivers such as the Aka and Tordzi deliver fresh water and nutrients from the north. This creates a mosaic of salinity conditions in which marine, brackish, and freshwater species coexist, sustaining a particularly productive but also particularly vulnerable fishery.

Keta Lagoon is recognized as the most important waterbird site on the Ghana coast and one of the most significant coastal bird areas along the Gulf of Guinea. Combined with the nearby Songor Lagoon, it ranks among the four most important waterbird sites on the Gulf of Guinea coast. Surveys have recorded more than seventy species of resident and migratory birds, with an estimated total population of well over one hundred thousand individuals, including globally significant numbers of at least twenty-one species.

The lagoon is especially important for migratory waders. It supports almost a third of the estimated East Atlantic Flyway population of the spotted redshank, and large numbers of curlew sandpiper, little stint, and black-winged stilt also pass through seasonally. White-faced whistling-duck occurs in sizeable flocks, and several heron and egret species use the shallow margins throughout the year. Key waterbird hotspots include the Fiahor, Woe, Tegbi, Adina, and Afiadenyigba sections of the lagoon.

Fish are the lagoon system, with both freshwater and marine species using its waters for feeding, spawning, and nursery habitat. Freshwater species such as Nile tilapia, redbelly tilapia, and jewel cichlids are present alongside marine visitors including mojarra, halfbeaks, needlefish, juvenile sardines, mullets, and crevalle jacks. The lagoon is also a major habitat for crabs, shrimps, and other crustaceans, both for the wild fishery and for aquaculture supported by the post-Sea Defence dredging and ocean link. Endemic Sarotherodon melanotheron dominates catches in places, reflecting the lagoon's unique brackish-water fish community.

The Keta Lagoon complex is one of the most important protected coastal wetlands in West Africa. It was designated a Ramsar Wetland of International Importance in 1992 under reference number 567 and has been recognized by BirdLife International as an Important Bird Area. These designations reflect both the lagoon's exceptional birdlife and its broader ecological significance as a mosaic of mangroves, open water, mudflats, and seasonally flooded grasslands.

Despite its protected status, the lagoon faces serious conservation pressures. Large areas of red and white mangrove have been cut for fuelwood and to make way for salt pans, undermining spawning, breeding, and feeding sites for fish and reducing the system's resilience to erosion. Overfishing, including the use of small mesh nets, has altered the size structure and species composition of catches, while pollution from domestic waste and habitat degradation further stress the ecosystem.

The Keta Sea Defence project, begun in 1999, has reshaped the conservation picture by reopening a controlled link between the lagoon and the sea, allowing floodwater to drain more effectively and shrimps to access lagoon habitat. This has helped restore some economic value to the fishery, even as it raised new concerns about salinity changes and interrupted sediment flows. Local fishing restrictions, including bans on fishing on certain days, reflect community-level attempts to manage catches sustainably, while calls from national figures and local leaders have highlighted the continuing need to protect the lagoon from garbage dumping, harmful fishing chemicals, and overextraction of its natural resources.

Keta Lagoon is at the center of Anlo-Ewe cultural life. The Anlo state formed when Ewe migrants from Notsie in central Togo settled first at Anloga in the seventeenth century and then expanded along the lagoon's shores, creating a network of towns tied together by the water body. Over generations, the lagoon has shaped language, customs, livelihoods, and political identity in Anlo land, and it remains a powerful symbol of community belonging.

Traditional spiritual practices remain closely tied to the lagoon. Practitioners of the Anlo belief system hold that the lagoon is inhabited by spirits who must be honored to ensure good catches. Rituals at sites such as Gbele near Anlo Afiadenyigba, including the ceremonial offering of livestock to the water, are still performed. The Bate Clan maintains a relationship with Mama Bate, a sea Orisha linked to Mami Wata, and explains the historical expansion of land around Keta through this spiritual bond.

Festivals, dances, and oral traditions keep the lagoon's cultural role alive. The annual Tagbaza, or Lagoon Festival, organized by chiefs and people of Anlo Afiadenyigba, brings communities together to celebrate and reflect on the health of the water body. Traditional dances such as agbadza, gahu, atsiagbekor, babasiko, and misago draw on the rhythms of lagoon life, while the economic practices that surround the water, from salt-winning to net-making and boat-building, form a craft heritage passed down through generations. At the same time, intergenerational change is gradually reshaping these traditions, as younger fishermen increasingly explain declining catches through ecological rather than spiritual causes.

Keta Lagoon stands out for the sheer scale of its open water, its importance as a hub of Anlo-Ewe life, and its global value for migratory waterbirds. It is the single most important waterbird site on Ghana's coast and one of the four most important along the Gulf of Guinea, supporting more than seventy species and an estimated population of over one hundred thousand birds, including exceptional numbers of spotted redshank and other waders on the East Atlantic Flyway.

The lagoon also stands out for the depth of its cultural imprint. Salt-winning during the harmattan, mangrove-based fishing, traditional boat-building, and spiritual rituals all remain part of the working life of the lagoon, while festivals like Tagbaza reinforce its identity as a living cultural landscape. As a Ramsar Wetland, an Important Bird Area, and a long-contested site of coastal defense and environmental management, it offers a rare combination of ecological, economic, and cultural significance along the West African coast.

The character of a visit to Keta Lagoon is shaped by the contrast between the wet and dry seasons on Ghana's eastern coast. During the wet season, from roughly May through October, the lagoon and its floodplains swell with rainfall and river inflow, creating expansive muddy margins that are particularly rich for waterbirds and visually dramatic for travelers interested in wetland scenery. Heavy rain and periodic flooding can, however, make low-lying roads and villages harder to access.

The harmattan dry season, from November into February, transforms the lagoon into a different landscape. Shallower parts of the lagoon close to towns such as Adina, Afiadenyigba, and Anyako evaporate under dry winds, leaving salt pans where communities harvest crystals in a practice that has been part of local life for centuries. Birding remains rewarding throughout, but the cooler, dustier harmattan air gives the lagoon a calmer, more contemplative atmosphere, well suited to cultural visits, festival attendance, and exploration of the various fishing towns that ring the shore.