coralreefpalau.org · Research
Updated Apr 17, 2026Current monitoring, abundance, temperature, and scuba prohibition.
Dive Spot Guide•
Jellyfish Lake - Ongeim’l Tketau
Ongeim’l Tketau is Palau's snorkel-only Jellyfish Lake in the Rock Islands.
Plan a boat transfer, permit, and short jungle walk; the lake is snorkel-only and jellyfish numbers swing with temperature and weather.
About Jellyfish Lake - Ongeim’l Tketau
Jellyfish Lake - Ongeim’l Tketau is Palau's best-known snorkel-only marine lake, reached by boat and a short jungle walk in the Rock Islands. Snorkelers move through a calm, sheltered surface layer among golden and moon jellyfish, while the lake's abundance swings with water temperature and seasonal weather. Scuba is prohibited, and access is managed with permits to protect the fragile lake.
•
Research Estimate At Jellyfish Lake - Ongeim’l Tketau
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 8m
AccessChallenging entry effort
Aquatic LifeGreat variety
FacilitiesNo facilities
Crowd / PopularityModerate
Where Is Jellyfish Lake - Ongeim’l Tketau?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Jellyfish Lake - Ongeim’l Tketau Planning Details
Depth range, seasonality, and planning context.
Reported Depth
0m - 30m
Depth Note
The lake basin reaches about 30 m, but visitors must stay in the oxygenated upper layer because deeper water becomes anoxic.
Best Season
Year-round, but cooler, wind-mixed periods are better than hot still spells.
Typical Conditions
Warm, calm surface water inside a sheltered meromictic lake; jellyfish position and abundance change with sun angle, temperature, rain, and wind.
Safety & Access At Jellyfish Lake - Ongeim’l Tketau
Hazards, restrictions, and access requirements.
Key Hazards
Restricted access
Safety Notes
Stay above the anoxic layer, move gently, do not touch the jellyfish, and keep foreign items out of the lake.
Access Restrictions
Only snorkeling is allowed; scuba is prohibited.
Legal Notes
A Jellyfish Lake permit is required, and scuba diving is prohibited under site rules.
Local Intel For Jellyfish Lake - Ongeim’l Tketau
Community notes to help plan your visit.
Scuba Diving
Scuba is prohibited. The lake is snorkel-only and visitors must stay in the oxygenated upper layer.
Freediving
Not a freedive site. The rules keep visitors in the snorkel zone above the anoxic layer.
Snorkeling
Snorkeling is the right fit here: stay gentle, remain in the allowed layer, and treat the visit as a conservation-first outing.
Wildlife at Jellyfish Lake - Ongeim’l Tketau
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Jellyfish Lake - Ongeim’l Tketau
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Jellyfish Lake - Ongeim’l Tketau
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility8m
Activity
No dive activity logged yet.
