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The Tunnel
Chaguian, Guam
Water bodyPhilippine Sea
Water temp28–30°C
Estimated from climate dataDec–Jun
About this site
The Tunnel is a cave and drift dive site near Chaguian, Guam, Guam, in the Philippine Sea. Marine life recorded within about 5 km (OBIS/GBIF) includes groupers, dolphins, sea turtles, sea fans, lobsters. Typical surface water temperature ranges from about 28 to 30 °C over the year.
Conditions by month
BestGoodMixedOctoberGood
Generally good diving.
Marine life
Recorded nearby
Princess DamselPomacentrus vaiuli
Fivestripe WrasseThalassoma quinquevittatum
Brown SurgeonfishAcanthurus nigrofuscus
Lined BristletoothCtenochaetus striatus
Bullethead ParrotfishChlorurus spilurus
Darkfin HindCephalopholis urodeta
Arc-eye HawkfishParacirrhites arcatus- Pacific GregoryPlectroglyphidodon fasciolatus
Nearby sites
- 1Octopus Reef1.9 km
- 2Tanguisson7.2 km
- 3Gun Beach9.4 km
- 4Tumon bay, Guam11 km
- 5Palace Wall14 km
- 6Marine Lab20 km
Straight-line distances.
Sources: Species occurrences: OBIS (CC BY 4.0), GBIF.org