Overview
In the middle of the Tumon strip, this aquarium is built around a 100m acrylic tunnel — among the world's longest — where sharks, big rays, sea turtles and a Napoleon wrasse glide overhead through reef habitats of Guam's waters. Compact but conveniently opposite T Galleria, it's the go-to rainy-day or midday-heat escape, with evening dinners served inside the tunnel itself.
💰 Tickets
About $23 adults, $12 children at the gate; advance tickets cost less.
🎟️ Check ticket prices →Opening Hours
Roughly 10:00-18:00 (evening programs separate)
🚇 Getting there
Opposite T Galleria on the Tumon strip — walk from any hotel.
⏱️ How long to visit
About 1-1.5 hours.
🌅 Best time to visit
Save it for rain or the midday heat (12-3pm).
Travel Tips
Buy tickets online or via agencies for less than the gate price; feeding time around 3pm doubles the show.
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🇰🇷 Tips for Korean Travelers
Practical info for Korean travelers heading to Guam, United States from Seoul (ICN).
Korean Passport · Visa
Check visa rules for United States on the Korean MOFA travel advisory site before flying — visa-free, visa-on-arrival or e-visa rules change often. Keep at least 6 months of passport validity.
Flight from Incheon (ICN)
Compare direct and connecting flights from Incheon (ICN) to Guam on Skyscanner or Google Flights. Early-morning departures from Korea are usually the cheapest option.
KRW ↔ Local Currency
Check the live FX widget above for the latest KRW rate. Korean travel cards like Travel Wallet, Hana EZ and Toss FX offer free local ATM withdrawals and competitive rates.
Korean Community · Korean Food
Many cities have an active Korean community in Guam with Korean restaurants, mini-marts, and Korean-speaking guides. Search Naver Cafe or KakaoTalk open chats for "Guam 한인" before you go.
Attractions near UnderWater World Guam
Tap a pin on the map to jump to that attraction.
Things to Do in Guam
Dolphin Watching Cruise
Boat out to meet wild spinner dolphins — usually bundled with snorkeling and fishing on a half-day cruise.
Sea Walker & Snorkeling
Walk the seafloor in a dive helmet — no swimming skills needed to enter the reef.
Southern Island Loop Drive
War park, Fish Eye, Cetti Bay, Umatac, Inarajan pool and Talofofo Falls — the classic half-day drive.