
Chole Bay Gardens
Mafia Island · Tanzania
Chole Bay Gardens is a series of interconnected coral gardens on the protected inner edge of Chole Bay, where calm, clear water and a spectacular diversity of coral growth forms — from metre-wide lettuce corals to branching staghorn thickets and ancient brain corals — make it the most approachable and photogenic site within Mafia Island Marine Park. The shallows here are famously productive for macro life — Coleman shrimp on fire urchins, pygmy seahorses on gorgonians, and hunting frogfish that sit motionless for days on the same sponge — and the site's protected position means it is diveable year-round, even when southern swells make the outer reef inaccessible.
Conditions
Depth
3 to 22 m
Open water and up
Current
Usually still
Can pick up on the edge
Visibility
18 to 28 m
Clearest in the calm season
Water
23 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 27 | 27 | 28 | 28 | 26 | 24 | 23 | 23 | 24 | 25 | 26 | 27 |
| Vis (m) | 12 | 12 | 10 | 8 | 8 | 15 | 18 | 18 | 18 | 15 | 12 | 12 |
| Current | Still | Still | Still | Gentle | Gentle | Still | Still | Still | Still | Still | Still | Still |
Your chances of seeing each animal
Miller'S Nembrotha
Last confirmed Oct 23, 2025 · 2 records
Likely
About 6 in 10 dives
Common Seahorse
Last confirmed Jun 26, 2024 · 1 records
Sometimes
About 1 in 3 dives
Leaf Scorpionfish
Last confirmed Mar 1, 2025 · 1 records
Sometimes
About 1 in 3 dives
Allard'S Anemonefish
Last confirmed Oct 23, 2025 · 3 records
Sometimes
About 1 in 3 dives
Pygmy Seahorse
Expected
Known here, not yet in recent logs
Spanish Dancer
Expected
Known here, not yet in recent logs
Coleman Shrimp
Expected
Known here, not yet in recent logs
Gear