Planning a trip?
Hotels, dive operators, gear, and how to get here are on the Great Blue Hole location page.
Overview
Spur-and-groove reef along Long Caye's protected lee, with healthy hard coral cover, garden eels in the sand patches, and resident green moray eels in the swim-throughs. Gentle conditions make it a popular checkout dive on Lighthouse Reef itineraries.
What you'll see
4 species curated- year-roundGreen moray eel
- year-roundGarden eel
- year-roundNassau grouper
- year-roundSpotted drum
Sightings evidence
1 record on file- high confidenceGreen moray eel
- 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 We deliberately do not publish a numeric '% chance of sighting' from this data.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- Macro camera — Garden eel and spotted drum colonies reward a long lens.
Next step
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Hotels, liveaboards, dive operators, gear recommendations, and travel logistics for the whole region.
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