Guam (Blue Hole)
A vertical sinkhole connected to the sea by an underwater tunnel, one of Guam's most iconic dive sites.
Depth
5–40 m
Recommended level
Advanced Open Water
Average visibility
25 m
Water temperature
28 °C
Current
Weak to moderate
Access
Shore/Boat
Best time
All year round
Recommended certification
Advanced Open Water
Approx. price
55 USD / dive
A vertical sinkhole connected to the sea by an underwater tunnel, one of Guam's most iconic dive sites.
Location
See on the interactive map43 species documented in Guam (Blue Hole)
Least ConcernBarracuda
Sphyraena barracuda
EndangeredNapoleón
Cheilinus undulatus
EndangeredTiburón gris de arrecife
Carcharhinus amblyrhynchos
EndangeredTortuga verde
Chelonia mydas
Critically EndangeredAlmeja gigante
Tridacna gigas
Anguila jardinera moteada
Heteroconger hassi
Anguila serpiente de bandas
Myrichthys colubrinus
Anémona alfombra gigante
Stichodactyla gigantea
Anémona disco
Discosoma nummiforme
Anémona magnífica
Heteractis magnifica
Babosa de mar verrugosa
Onchidium verruculatum
Bigeye de arrecife
Priacanthus hamrur
Ecosystem
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