Tucked away in East Kalimantan, Maratua Island offers everything a diver could dream of: turquoise lagoons, dramatic coral walls, and encounters with turtles, manta rays, and schooling barracudas. For beginners and seasoned divers alike, it’s the perfect balance between adventure and serenity.

Few places in the world can rival the untouched beauty of Maratua Island. Nestled in the Derawan Archipelago, East Kalimantan, this small crescent-shaped island has earned a global reputation as one of Indonesia’s best diving destinations. The crystal-clear waters, healthy coral reefs, and thriving marine biodiversity make every dive here unforgettable. If you’re planning a diving trip to Indonesia, here are seven extraordinary marine species that will make your Maratua adventure truly special.

Indonesia is known as one of the world’s greatest diving destinations, with famous names like Bali, Raja Ampat, and Komodo often topping divers’ bucket lists. Yet hidden in the Derawan Archipelago of East Kalimantan lies Maratua Island, a true gem that remains under the radar. With pristine coral reefs, abundant marine life, and far fewer crowds, Maratua offers an untouched charm that many divers seek.

With more than 17,000 islands scattered across the Coral Triangle, Indonesia is home to some of the most breathtaking dive sites on the planet. From manta rays gliding in Bali to the untouched marine biodiversity of Raja Ampat, every destination has its own magic. But timing matters—choosing the best season ensures crystal-clear visibility, calm waters, and encounters with iconic marine life. Here’s your complete guide to the best diving time in Indonesia, from Bali to Maratua.

Big Fish Country is not just a dive site—it’s a rite of passage for any serious diver exploring Indonesia. Located just off the southern tip of Maratua Island, this legendary spot promises fast currents, thrilling drifts, and big marine action. If you're staying at Sienna Resort, you're already halfway to one of Southeast Asia’s most exhilarating underwater experiences.

If you're dreaming of clear turquoise waters, vibrant coral reefs, and unforgettable marine encounters this summer, look no further than Sienna Resort Maratua. Nestled in the heart of Indonesia's Coral Triangle, this hidden gem offers world-class diving with a touch of luxury and authentic island charm.

Imagine gliding through the clear blue waters of Maratua, sharing the ocean with one of nature’s most gentle giants, the majestic whale shark. For divers and ocean lovers, encountering a whale shark is an unforgettable dream come true. Sienna Resort Maratua offers the perfect base to turn this dream into reality. In this guide, discover how to plan, book, and enjoy a responsible and memorable whale shark tour from our resort.

If you’ve ever dreamed of swimming alongside majestic sea turtles and graceful manta rays, Maratua is the place to be. Located in the heart of Indonesia’s stunning Derawan Archipelago, this island is known for its crystal-clear waters, vibrant marine life, and endless adventure. At Sienna Resort, we’re here to show you the magic beneath the waves, where you can dive into turquoise waters and come face to face with some of the ocean’s most incredible creatures.

Imagine descending into crystalline waters, only to find yourself surrounded by thousands of shimmering barracudas spiraling around you like a living tornado. Welcome to Maratua Island, one of Indonesia's hidden gems, where the Barracuda Tornado offers an underwater spectacle that even seasoned divers find unforgettable. If you're seeking an extraordinary diving experience far from the usual tourist trails, the Barracuda Tornado at Maratua is calling your name.

Maratua Island is a paradise for divers, and one of its most thrilling and favorite underwater attractions is The Channel, also known as Big Fish Country. Located just a five-minute boat ride from Sienna Resort, this dive site is a must-visit for those seeking an adrenaline-pumping experience surrounded by incredible marine life.