Amphitheater
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Amphitheater is a reef dive on the ocean side of Cabras Island in Guam. A large, rounded and layered area of the reef resembles an underwater amphitheater, which gives the site its name.
Depths run from 40 to 130 feet (12 to 39.6 metres). The terrain drops from 60 feet (18 metres) to more than 120 feet (36 metres) in the outer reef areas. Sharks, tuna, turtles and barracuda are commonly seen here, and visibility ranges from 60 to 75 feet (18 to 23 metres).
The site is prone to a western swell that makes diving at 30 feet (9 metres) somewhat challenging, but below that depth it is a relatively simple dive. It is normally done from a boat. The beach entry is sometimes possible, but conditions are usually rough and shipping containers often block the roadside entry.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Pacific Bullethead ParrotfishChlorurus spilurusReported here · unconfirmed
Tracey's DamselfishChrysiptera traceyiReported here · unconfirmed
Princess DamselPomacentrus vaiuliReported here · unconfirmed
Dusky SurgeonfishAcanthurus nigrofuscusReported here · unconfirmed
Lined BristletoothCtenochaetus striatusReported here · unconfirmed
Staghorn DamselAmblyglyphidodon curacaoReported here · unconfirmed
Yellowbar ParrotfishScarus schlegeliReported here · unconfirmed
Pacific Orange-spine UnicornfishNaso lituratusReported here · unconfirmed
Slingjaw WrasseEpibulus insidiatorReported here · unconfirmed
TunaTunaReported here · unconfirmed
BarracudaBarracudaReported here · unconfirmed
Galaxy CoralGalaxea fascicularisObserved near here · iNaturalist
Blue LinckiaLinckia laevigataObserved near here · iNaturalist
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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