Qualla: Chumbe Island

Chumbe Island: Introduction

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit O.Mustafin, CC0. The military saved Chumbe Island's reef without meaning to. For decades, the waters surrounding this small coral island in the Zanzibar Channel fell within a Tanzanian military zone, and that accident of geography kept fishermen, divers, and boats away from a fringing reef that harbored extraordinary life. By the time conservationists arrived in the early 1990s, they found something almost vanished from East African waters: a reef system still intact, still thriving, still sheltering species that overfishing had driven from neighboring coastlines. Chumbe Island -- Kisiwa cha Chumbe in Swahili -- sits about 12 kilometers southwest of Stone Town, a sliver of coral rock and dense forest barely visible from shore. Two structures from the early 20th century stand on the island: a small Swahili mosque and a lighthouse, both quiet witnesses to a century of accidental preservation.

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Image: O.Mustafin | CC0

Chumbe Island: An Unplanned Sanctuary

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Zenith4237, CC BY-SA 4.0. In 1992, the fringing reef on Chumbe's western side was officially closed to fishing, boating, and diving. Two years later, the Tanzanian government declared the island and its surrounding waters the Chumbe Island Coral Park, establishing both the Chumbe Reef Sanctuary and a Clos...

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Image: Zenith4237 | CC BY-SA 4.0

Chumbe Island: The Reef Below

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Zenith4237, CC BY-SA 4.0. The numbers tell a story of remarkable abundance. At least 90 percent of all hard coral species recorded in Eastern African reefs have been found in the waters near Chumbe Island. Around 400 fish species from 50 different families have been documented here, including the giant gr...

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Image: Zenith4237 | CC BY-SA 4.0

Chumbe Island: Zero Impact on the Island

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Rob from United Kingdom, CC BY 2.0. The seven eco-bungalows on Chumbe Island were designed to leave no trace. Rainwater catchment systems supply fresh water. Photovoltaic panels and solar water heaters provide energy. Composting toilets process waste. Vegetative greywater filtration returns used water to the ground...

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Image: Rob from United Kingdom | CC BY 2.0

Chumbe Island: Wings Over the Reef

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Zenith4237, CC BY-SA 4.0. Chumbe is also sky-bound. The island and adjacent Kombeni and Kiwani bays on Unguja's southwestern coast form a 4,000-hectare Important Bird Area designated by BirdLife International. Roseate terns breed on the island in significant numbers -- an estimated 750 pairs were counted ...

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Image: Zenith4237 | CC BY-SA 4.0