Planning a trip?
Hotels, dive operators, gear, and how to get here are on the Great Blue Hole location page.
Overview
Vertical wall on the eastern edge of Lighthouse Reef with massive barrel sponges, black coral, and a steady parade of eagle rays. Top of the wall starts at 8 m and tumbles into 600 m of blue water. Often paired same-day with the Blue Hole.
What you'll see
4 species curated- year-roundSpotted eagle ray
- year-roundReef shark
- year-roundHawksbill turtle
- seasonalTarpon
Sightings evidence
1 record on file- high confidenceSpotted eagle ray
- 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 We deliberately do not publish a numeric '% chance of sighting' from this data.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
- OBIS-SEAMAP — Duke University Marine Geospatial Ecology Lab / OBIS
- iNaturalist — California Academy of Sciences & National Geographic Society
- 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 | 25–26 °C | 20–35 m | mild |
| Feb | 25–26 °C | 20–35 m | mild |
| Mar | 26–27 °C | 25–40 m | mild |
| Apr | 26–27 °C | 25–40 m | mild |
| May | 27–28 °C | 25–40 m | mild |
| Jun | 28–29 °C | 20–35 m | mild |
| Jul | 28–29 °C | 20–35 m | mild |
| Aug | 28–29 °C | 20–35 m | mild |
| Sep | 28–29 °C | 15–30 m | mild |
| Oct | 27–28 °C | 15–30 m | mild |
| Nov | 26–27 °C | 20–35 m | mild |
| Dec | 25–26 °C | 20–35 m | mild |
Season calendar
Peak season highlighted · current month outlined
Gear for this site
Beyond the basic kit- SMB + reel — Wall drifts end in open water.
Next step
Book your trip to Great Blue Hole
Hotels, liveaboards, dive operators, gear recommendations, and travel logistics for the whole region.
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