There are few dive sites on this uninhabited island, but the focus here is Lake Kakaban or the Jellyfish Lake. Technically, you are not allowed to dive here, but snorkeling is an option. Located in the middle of Kakaban Island, this saltwater lake makes up most of the island’s topography.

Jellyfish Lake is one of the seven lakes in the world where visitors can swim with the stingless jellyfish. There are two other locations in Indonesia, one in the Togean Islands in Sulawesi and one in Misool, Papua. This lake is home to four jellyfish species: moon jellyfish (Aurelia aurita), spotted jellyfish (Mastigias papua), box jellyfish (Tripedalia cystophora), and upside-down jellyfish (Cassiopea ornate). The isolated lake has made these jellyfish stingless due to the absence of natural predators like turtles and barracuda.

Stingless jellyfish are not the only main attractions, but some fish species like needlefish, black cardinalfish, gobies, sea snakes, and sea cucumbers are commonly found here.