Jellyfish Lake
Also known as: Ongeim'l Tketau
Best time to dive
January to December; December
Certification & difficulty
Open Water
Snorkelling
Snorkel-friendly - Yes - primary and only activity; SCUBA diving has been prohibited since 1998
Safety notes
Deep hydrogen sulfide layer (below ~15m) is toxic and has caused diver deaths historically; sunscreen/lotions banned to protect jellyfish; no fins allowed
Permits & fees
Requires Rock Islands Southern Lagoon (RISL) entry permit plus a separate Jellyfish Lake permit, Koror State Government - approx USD 100 (10-day, per reporting) with a USD 50 Rock Island Use fee also cited; a 2024-25 Koror State proposal sought to raise these (Rock Island Use to $100/4 days, Jellyfish Lake to $150/1 day) - VERIFY current amount before travel; separate from the national PPEF included in airfare
Permits and operators change - confirm before booking.
Location
Nearest hub: Koror
This profile is desk research, compiled from public sources - not a first-hand dive report. Coordinates are approximate.