Jellyfish in sunlit green water

Lake Mariona

Jellyfish Lake

An enclosed marine lake where you can swim among jellyfish with a very weak sting.

Overview

Jellyfish Lake in the Togeans

Lake Mariona is an enclosed marine lake in the Togean Islands with a large population of Mastigias-type jellyfish. Their sting is very weak, so swimming among them is considered safe. The lake is usually visited by boat from Kadidiri.

The number of jellyfish changes with the season and conditions. They gather in the upper, sunlit part of the water.

Lake rules

These rules protect the lake.

  • No sunscreen, lotion or insect repellent before swimming.
  • Do not wear fins.
  • Do not touch or lift the jellyfish.
  • Enter and exit only at the point your guide shows you.
  • Location: Lake Mariona, by boat from Kadidiri
  • Rules: No sunscreen, no fins, no touching

Last updated

Type
On the water
Where
Lake Mariona
Best time
Late morning to early afternoon
Level
Easy; no current

Locations

Where to go jellyfish lake

  • An enclosed lake

    Marine lake

    Sea water enters through the rock, but predators cannot. The jellyfish have developed a very weak sting.

  • Timing

    Middle of the day

    The jellyfish follow the sunlight. Visit when the sun is high.

  • Size

    About 8 to 10 cm

    The bells are small and amber in colour. Enter slowly and let your eyes adjust.

  • Sensitivity

    Fragile ecosystem

    Sunscreen, lotion and soap can damage the lake's chemistry.

Islands

Jellyfish Lake on the islands

Good to know

Frequently asked questions

Do the jellyfish sting?

Most people feel nothing. People with sensitive skin may notice a slight tingle.

Can I wear sunscreen?

No. Wear a rash guard or long-sleeved swim top instead.

Can non-swimmers visit?

Yes, with a life jacket. The water is calm.

Activities

Other activities

All activities