Jellyfish Lake - Ongeim’l Tketau
Protected Area
Rock Island Southern Lagoon Management Area
Why dive here
With 182+ marine species recorded in the area - including barracuda, lionfish, mandarin fish, napoleon wrasse and nautiluses - Jellyfish Lake - Ongeim’l Tketau offers some of Rock Islands's richest diving. Water ranges 29-30°C, warmest June, October, November.
Jellyfish Lake, or Ongeim’l Tketau, is one of those spots that feels like stepping into a documentary. It’s not a dive site in the traditional sense, more a unique snorkel. You swim through layers of golden jellyfish, *Mastigias papua*, pulsating gently around you. They're non-stinging here, having evolved without predators, so you can float right among them, feeling their soft bodies brush your skin. It’s a calm, almost meditative experience, totally unlike open-ocean diving and perfect for anyone looking for something truly different.
Typical Jellyfish Lake - Ongeim’l Tketau Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Always perform a 3-minute safety stop at 5m before surfacing.
Nearest Dive Centres to Jellyfish Lake - Ongeim’l Tketau
Dive shops near Jellyfish Lake - Ongeim’l Tketau
Cruise Control palau
Cruise Control palau
DayDream Dive Center
Blue Marlin
Blue Marlin
Sam's Tours
Reviews for Jellyfish Lake - Ongeim’l Tketau
Conditions
Ocean conditions, forecast and tides for Jellyfish Lake - Ongeim’l Tketau
Jellyfish Lake - Ongeim’l Tketau Ocean Conditions
Monthly averages for Jellyfish Lake - Ongeim’l Tketau, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (7.2, 134.3) (4km away)
October Averages
Sea Temperature
30°C
86°F · Range: 28.5–31.2°C
Current Speed
10.05 cm/s
Direction: N (5.7°)
Chlorophyll-a
0.026 mg/m³
Very clear (oligotrophic)
Salinity
33.62 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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