Palau Jellyfish Lake

Palau Jellyfish Lake Diving Guide

Palau's Jellyfish Lake offers a surreal and unforgettable experience: swimming among millions of non-stinging jellyfish. This unique ecosystem, isolated for thousands of years, allows divers (actually snorkelers, as diving is prohibited) to interact intimately with these fascinating creatures.

Dive Details

Typical Depth Range

The lake is relatively shallow. The maximum depth is approximately 30 meters (100 feet), but most of the jellyfish are concentrated in the top 15 meters (50 feet). Snorkeling is the only permitted activity.

Average Visibility

Visibility varies slightly with weather conditions and algae blooms, but generally remains quite good, averaging 5-10 meters (15-30 feet).

Water Temperature (Seasonal)

The water temperature remains fairly constant year-round, ranging from 27-30°C (81-86°F). No thermal protection is typically needed.

Difficulty Level

Easy. The lake is calm and currents are minimal, making it suitable for beginner snorkelers. A short but mildly steep walk is required to reach the lake from the dock.

Marine Life

The primary attraction is, of course, the millions of golden jellyfish (Mastigias papua etpisoni) and moon jellyfish (Aurelia aurita). Due to their isolation and lack of natural predators, these jellyfish have evolved to be virtually stingless. Aside from the jellyfish, you may also observe some small fish and algae.

Best Time to Visit

Palau enjoys a tropical climate, making Jellyfish Lake accessible year-round. However, the dry season (November to April) generally offers the best conditions with less rainfall and calmer seas. During the rainy season (May to October), visibility can be slightly reduced.

What Makes It Special

Jellyfish Lake is truly a one-of-a-kind ecosystem. The high concentration of non-stinging jellyfish allows for a unique and safe interaction. The lake is a meromictic lake, meaning the layers of water do not mix, leading to distinct chemical compositions at different depths. This contributes to the unique environment that supports the jellyfish.

Practical Tips

• No Diving Allowed: Scuba diving is strictly prohibited in Jellyfish Lake to protect the fragile ecosystem.
• Sunscreen Restrictions: Only reef-safe sunscreen is permitted to avoid harming the jellyfish and the lake's delicate balance.
• Gentle Movements: Avoid kicking or splashing excessively, as this can disturb the jellyfish.
• Avoid Touching the Bottom: Stirring up the sediment can be harmful to the lake's ecosystem.
• Respect the Environment: Take only pictures and leave only bubbles. Do not remove anything from the lake.
• Listen to Your Guide: Local guides provide valuable information about the lake and its inhabitants.