– Over 870 species of fish and 600 species of coral.
– Iconic species such as manta rays, sea turtles, and whale sharks.
– Ideal diving conditions from April to November.
Marine Biodiversity in the Derawan Islands

The Derawan Islands, located off the east coast of Borneo in Indonesia, offer an unparalleled marine experience for divers and marine life enthusiasts. This archipelago includes several islands such as Derawan, Maratua, Sangalaki, and Kakaban, each boasting unique ecosystems that contribute to the region’s rich marine biodiversity. With a total marine area of more than 1,000 square kilometers, the Derawan Islands are part of the Coral Triangle, known for the highest diversity of coral reefs and marine species globally.
Key Marine Life Species
The Derawan Islands are teeming with marine life, including a variety of iconic species that attract divers from around the world. Here are some of the key marine life species you can encounter:
1. Manta Rays
Manta rays are one of the main attractions in the Derawan Islands. These gentle giants can often be seen gliding gracefully through the water. The best time to spot them is during the peak season from April to November, especially around Sangalaki Island, where they gather for feeding.
2. Sea Turtles
Several species of sea turtles, including the Green Turtle and the Hawksbill Turtle, inhabit the waters around the Derawan Islands. These turtles are often seen resting on coral reefs or gliding through the water. Conservation efforts have been initiated in the region to protect nesting sites, making turtle sightings a delightful experience for divers.
3. Whale Sharks
Whale sharks, the largest fish in the ocean, can be spotted in the waters around the Derawan Islands. These filter feeders are usually seen in deeper waters, and encounters with them are singular for divers. While sightings cannot be guaranteed, the chances are higher during the months of April to June.
4. Colorful Coral Reefs
The coral reefs surrounding the Derawan Islands are among the most diverse in the world, housing over 600 species of coral. The vibrant colors of the coral formations create a striking underwater landscape, providing habitat for numerous fish species. Divers can expect to see soft and hard corals, as well as unique formations like coral gardens and walls.
5. Diverse Fish Species
The marine waters around the Derawan Islands are home to more than 870 species of fish. This includes everything from tiny clownfish to large schools of barracuda. Popular species to spot include:
– Butterflyfish
– Parrotfish
– Triggerfish
– Surgeonfish
The variety of fish makes each dive a unique experience, with new species to discover during every expedition.
Best Diving Locations in the Derawan Islands
The Derawan Islands offer an range of diving spots catering to both novice and experienced divers. Here are some of the best locations:
1. Sangalaki Island
Sangalaki is renowned for its manta ray sightings and is a top diving destination. The island features steep drop-offs and rich coral gardens, providing an ideal environment for a variety of marine species. Dive sites here are suitable for all levels of experience.
2. Maratua Atoll
Maratua Atoll offers diverse dive sites with unique underwater topography, including caves and overhangs. The waters here are often filled with large pelagic species, making it a thrilling dive location. The atoll is also known for its excellent visibility, especially from April to November.
3. Kakaban Island
Kakaban Island is famous for its jellyfish lake—one of the few in the world. While diving here, you can encounter a variety of marine life, including the unique golden jellyfish. The waters surrounding Kakaban feature rich biodiversity, making it a must-visit for divers.
4. Derawan Island
Derawan Island itself is a popular diving destination, known for its vibrant coral gardens and diverse marine life. The island offers easy access to several dive sites, making it suitable for divers of all skill levels. Night dives here are particularly rewarding, as many species come to life after sunset.
When to Visit the Derawan Islands
The best time for diving in the Derawan Islands is from April to November, when the waters are warmer, and visibility is at its peak. During this period, divers can expect to see an abundance of marine life. The months of July and August are particularly busy, making it advisable to book your trips in advance.
Conservation Efforts
Efforts to conserve the marine environment around the Derawan Islands are ongoing. Local communities, in collaboration with conservation organizations, are working to protect the delicate ecosystems and promote sustainable tourism practices. Divers are encouraged to follow responsible diving guidelines, such as avoiding touching corals and not feeding marine life.
Luxury Yacht Charters and Diving Expeditions
For those looking to explore the Derawan Islands in style, Derawan Yacht offers exclusive travel experiences, including luxury yacht charters and diving expeditions. With tailored itineraries for both novice and experienced divers, guests can immerse themselves in the rich biodiversity and vibrant coral reefs of the region.
By choosing a yacht charter, you can enjoy the convenience of traveling between islands while having access to some of the best dive sites in the area. The knowledgeable crew will ensure that your diving experience is both safe and singular.
Encounter Sea Turtles at Derawan Islands
Among the many marine wonders of the Derawan Islands, the opportunity to swim alongside sea turtles is a highlight not to be missed. These gentle creatures can often be seen gliding gracefully through the clear waters, offering an singular experience for snorkelers and divers alike. Curious about trip details? See see current rates or check availability.