1 Day
Up to 2 days
100 people
English, Indonesia
Nusa Penida, Bali, is renowned for its vibrant underwater world and rich biodiversity. Recently, it has become the focus of global marine science due to the discovery of what may be the world’s largest coral colony — a massive Galaxea astreata reef, spanning more than 4,000 square meters. This extraordinary coral colony, towering up to 10 meters high and measuring 58 meters wide by 71 meters long, was discovered and meticulously measured by the team at Ocean Gardener, a respected Indonesian marine biology and conservation group.
Located just off the north coast of Nusa Penida near Sental Village, this coral colony benefits from the unique ocean currents in the Lombok Strait, where the Pacific Ocean flows into the Indian Ocean. This prime location contributes to optimal coral growth conditions, enabling corals here to reach monumental sizes that are rarely seen elsewhere in the world.
Choosing Nusa Penida diving tours that focus on coral exploration offers a unique chance to witness an underwater spectacle few people ever see. The giant Galaxea astreata coral is not just a dive spot — it’s a living monument to marine life’s resilience and beauty. Unlike typical reef dives, here divers explore a site that could hold a new world record for coral size.
Nusa Penida is also famous for its large populations of manta rays and ocean sunfish, making it a well-rounded marine destination. By joining coral-focused diving tours, you get to appreciate the reef from an ecological and conservation perspective. These tours are designed to promote sustainable tourism by educating divers about coral health and reef restoration.
For those interested in a deeper, educational diving experience, Ocean Gardener offers a variety of coral diving courses in Bali. These courses are perfect for divers of all skill levels who want to understand more about coral species, reef ecology, and conservation methods.
Popular courses include:
Intro to Coral Dive — Beginner-friendly course teaching coral identification and reef ecology basics.
Coral Restoration Course — Learn how to actively help restore damaged reefs through coral farming and transplantation.
Giant Clam Diver Course — Discover the role of giant clams in reef ecosystems and how to protect them.
Reef Fish Course — Dive deeper into fish species that inhabit coral reefs and their ecological roles.
All courses are led by professional marine biologists and certified diving instructors who are passionate about protecting Bali’s reefs. They combine theory, pool practice, and open-water dives around the Nusa Penida coral colony.
Sustainability is a key part of Ocean Gardener’s philosophy. These eco-friendly diving experiences emphasize responsible diving practices that minimize environmental impact and support marine conservation. By diving with Ocean Gardener, you contribute to reef preservation efforts and local community education.
Marine protected areas around Nusa Penida safeguard this giant coral colony and many other marine species, helping to maintain Bali’s reputation as one of the world’s best diving destinations.
Prices for Ocean Gardener Coral Courses (approximate in IDR):
Intro To Coral Dive – Rp 5,130,384
Giant Clam Diver Course – Rp 1,282,596
Coral Discovery Course – Rp 1,282,596
Anemone Course – Rp 1,795,634
Coral Restoration Course – Rp 11,222,715
Reef Fish Course – Rp 11,222,715
Sea Fan Course – Rp 1,795,634
Clownfish Diver Course – Rp 1,795,634
Advanced Coral Diver Course – Rp 11,222,715
Requirements:
This price for Coral Restoration Course “Ocean Gardener”
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