Strongest research + access combination
Havannah Harbour, Moso, Lelepa and north Efate
For a short Vanuatu visit, Havannah Harbour offers the strongest blend of documentary evidence, sheltered habitat and practical access from Port Vila.
What the evidence shows
Havannah Harbour sits between northwest Efate, Moso and Lelepa. Historical research identified the harbour, Undine Bay and nearby reef flats as a potentially connected dugong habitat system. During the 1987 aerial work, observers recorded an adult between Moso and mainland Efate and an adult with a young animal between Lelepa and Efate.
A limited north Efate drone project conducted in 2021 strengthens the modern case. Across 38 flights and 7,465 photographs in two targeted blocks, the survey protocol recorded three dugong detections: two in Havannah Harbour and one in the separate Pele–Kakula–Emua block. In Havannah, adjacent transects could have shown the same travelling animal more than once, so the safest conclusion is that the photographs establish at least one live dugong in the harbour during the survey—not abundance, residency or visitor odds.
“Three detections” is not “three dugongs live in Havannah Harbour”. One protocol detection came from a separate northeast Efate block, and the Havannah sequence could not establish how many unique animals it contained. The blocks were deliberately selected using local reports, submerged animals could be missed and the planned repeat survey was not completed. Do not convert this study into a population count or visitor success rate.
Read the full Havannah Harbour and Moso Island guide for the historical record, habitat, survey limits and current local context.
What a visitor can realistically expect
North Efate is the simplest area compared here to add to an Efate holiday. Current reports from local observers make a sighting a genuine possibility, but they are not yet a standardised success-rate series and cannot support a promise on any given day. A wider day can combine Moso Island, reefs, sheltered passages and coastal scenery, with a dugong treated as a possible wild encounter. Seagrass condition, weather, glare and recent animal movements all affect whether anyone sees one.
For Abyss travellers, this is the relevant setting around Moso and Havannah Harbour. The Vanuatu diving guide explains the destination’s reefs and trip styles, while the Vanuatu Long Weekend Dive Escape is built around warm-water diving—not a guaranteed dugong activity.