Planning a trip?
Hotels, dive operators, gear, and how to get here are on the Nosy Be location page.
Overview
Protected marine park off Madagascar's northwest coast with calm conditions and a relaxed reef community of turtles, octopus, and big honeycomb morays. Easy slope to 20 m suitable for new divers; the macro hunting is excellent.
What you'll see
4 species curated- year-roundHawksbill turtle
- year-roundHoneycomb moray
- year-roundOctopus
- year-roundScorpionfish
Sightings evidence
1 record on file- high confidenceHawksbill turtle
- Last confirmed
- May 2026
- Recent records
- 130 within 10 km
Sources & methodology
How we summarise this
We aggregate confirmed occurrence records from GBIF and OBIS within a fixed radius of each dive site. Occurrence records confirm presence and reveal seasonality clustering, but they DO NOT measure per-dive probability — there is no eligible-effort denominator. We deliberately do not publish a numeric '% chance of sighting' from this data.
Sources
- Global Biodiversity Information Facility — GBIF Secretariat
- Ocean Biodiversity Information System — IOC-UNESCO
- iNaturalist — California Academy of Sciences & National Geographic Society
- OBIS-SEAMAP — Duke University Marine Geospatial Ecology Lab / OBIS
- IUCN Red List of Threatened Species — International Union for Conservation of Nature
- WoRMS — World Register of Marine Species — Flanders Marine Institute (VLIZ)
- FishBase — FishBase Consortium
- Atlas of Living Australia — CSIRO / GBIF Australia
- REEF Volunteer Fish Survey — Reef Environmental Education Foundation
Conditions
| Month | Water | Visibility | Current |
|---|---|---|---|
| Jan | 28–30 °C | 15–25 m | mild |
| Feb | 28–30 °C | 15–25 m | mild |
| Mar | 28–30 °C | 15–25 m | mild |
| Apr | 27–29 °C | 20–30 m | mild |
| May | 26–28 °C | 20–30 m | mild |
| Jun | 25–27 °C | 20–30 m | mild |
| Jul | 24–26 °C | 20–30 m | mild |
| Aug | 24–26 °C | 20–30 m | mild |
| Sep | 25–27 °C | 20–30 m | mild |
| Oct | 26–28 °C | 20–30 m | mild |
| Nov | 27–29 °C | 15–25 m | mild |
| Dec | 28–30 °C | 15–25 m | mild |
Season calendar
Peak season highlighted · current month outlined
Gear for this site
Beyond the basic kit- Dive light — Hunting macro under ledges and at dusk.
Next step
Book your trip to Nosy Be
Hotels, liveaboards, dive operators, gear recommendations, and travel logistics for the whole region.
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