The Great Barrier Reef is not just Australia’s treasure. It belongs to the whole world, and that is exactly why it matters so much.
The Great Barrier Reef – One of Earth’s Greatest Natural Wonders
In short: The Great Barrier Reef is the world’s largest coral reef ecosystem, stretching about 2,300 kilometres along the Queensland coast and covering 344,400 square kilometres of protected marine park. Most visitors reach it on a day trip from Cairns, Port Douglas, Townsville or the Whitsundays, and you do not need to be able to swim or dive to see it.
New to the reef? Start with our top ten reasons to see the Great Barrier Reef.
This page answers: what the reef actually is, where it is and how far offshore, what lives there, the different ways to experience it, when to go, what it costs, and how to choose an operator that looks after the reef properly.
Where our facts come from: the size, species and protection figures on this page are taken from the Great Barrier Reef Marine Park Authority and the Australian Institute of Marine Science, and every source is listed at the foot of the page with the date we checked it.
The Great Barrier Reef is one of the world’s most extraordinary natural wonders. It stretches along Australia’s north-east coast and is home to an extraordinary diversity of marine life, coral reefs, islands and tropical ecosystems.
For visitors, the reef offers unforgettable experiences both above and below the water, from snorkelling and scuba diving to scenic flights and island escapes. This page is your starting point to learn about the Great Barrier Reef, understand what makes it so special, and discover the best ways to experience it safely and responsibly.
What Is the Great Barrier Reef?
The Great Barrier Reef is the largest coral reef system on Earth, made up of thousands of individual reefs and hundreds of islands. It is so vast that it can be seen from space and is recognised as a UNESCO World Heritage site for its outstanding natural value.
Rather than being a single reef, it is a living network of coral gardens, lagoons, channels and reef structures that support an enormous range of marine species and habitats.
Learn more on our dedicated page:
What Is the Great Barrier Reef
Where Is the Great Barrier Reef Located?
The Great Barrier Reef stretches for more than 2,300 kilometres along the Queensland coastline, from the Torres Strait in the north to Lady Elliot Island in the south.
The reef is accessed from several key gateway regions, including:
Each region offers a different style of reef experience, from outer reef snorkelling and diving to island-based adventures.
Explore locations in detail:
Where Is the Great Barrier Reef
The Great Barrier Reef by the Numbers
These are the figures published by the Great Barrier Reef Marine Park Authority, the Australian Government agency that manages the Marine Park. We use their numbers rather than the rounded ones that circulate online, because the rounded ones are usually wrong in interesting ways.
| Measure | Figure |
|---|---|
| Area of the Marine Park | 344,400 square kilometres |
| Length along the Queensland coast | About 2,300 kilometres |
| Width | Between 60 and 250 kilometres |
| Individual coral reefs | About 3,000 |
| Islands | 600 continental islands and 300 coral cays |
| Hard coral species | 450 |
| Soft coral and sea pen species | At least 1,000 |
| Fish species | 1,625 |
| Marine turtle species | 6 of the world’s 7 |
| Sharks and rays | 136 varieties |
| Whale and dolphin species | More than 30 |
| Share of the world’s coral reef ecosystems | About 10 per cent |
| Protected since | 1975, under the Great Barrier Reef Marine Park Act |
One figure surprises most visitors: coral reefs make up only about seven per cent of the Marine Park. The rest is seagrass meadows, mangroves, sandy and algal gardens, inter-reefal habitat and deep ocean. That matters when you are choosing a trip, because a boat that only visits one reef is showing you a very small slice of a very large place.
Why the Great Barrier Reef Is So Special
What makes the Great Barrier Reef truly unique is its scale, biodiversity and beauty.
Highlights include:
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- Thousands of coral reef formations
- Tropical islands and sandy coral cays
- Clear, warm waters ideal for snorkelling and scuba diving
- One of the richest marine ecosystems on the planet
Every visit to the reef is different, shaped by seasons, locations and the natural rhythms of the ocean.
Marine Life
The reef is home to an extraordinary array of marine animals, making it one of the best places in the world to observe ocean life in its natural environment.
Commonly seen species include:
Discover the reef’s wildlife here:
Great Barrier Reef Animals
Islands and Reefs of the Great Barrier Reef
Scattered throughout the reef are hundreds of islands and individual reef systems, each offering something different, from rainforest-covered islands to remote coral cays surrounded by shallow lagoons.
Popular experiences include:
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- Island day trips and overnight stays
- Snorkelling directly from beaches
- Access to surrounding reef systems
Explore island destinations:
Great Barrier Reef Islands
Best Ways to Experience the Great Barrier Reef Australia
There are many ways to enjoy the Great Barrier Reef, depending on your interests, time and comfort level.
Ideal for beginners and families, snorkelling allows you to float above coral gardens and observe marine life up close.
Scuba Diving
Diving offers a deeper, more immersive look at reef ecosystems and is suitable for both first-time and certified divers.
Scenic Flights
Helicopter and plane flights reveal the reef’s full scale and stunning colour patterns from the air.
Island Visits and Liveaboards
Island stays and overnight reef experiences provide extended time on and around the reef.
Browse experiences here:
Great Barrier Reef Tours
Best Time to Visit
The reef can be visited year-round, with each season offering different conditions and highlights. Water temperatures, visibility and marine life activity vary across the year and by region.
Plan your visit with confidence:
Reef Safety and Visitor Information
Your safety and enjoyment are important when visiting the reef. Understanding basic reef safety, seasonal conditions and marine etiquette helps ensure a positive experience for both visitors and the reef itself.
Topics include:
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- Snorkelling and swimming safety
- Stinger season awareness
- Reef-safe sunscreen
- Respectful wildlife interaction
Read essential tips here:
Reef Safety Hub
What It Costs to Visit the Reef
Almost every visitor is surprised by one line on their booking, so it is worth explaining before you pay. Everyone who joins a commercial tour inside the Marine Park pays an environmental management charge. It is set by the Reef Authority, not by the tour operator, and every cent of it goes into managing the Marine Park.
- Full-day trips (three hours or more): $8.50 per person, per day.
- Part-day trips (under three hours): $4.25 per person.
- Semi-submersible or glass-bottom boat excursions: 40 cents per excursion.
- GST is not charged on the environmental management charge.
The Reef Authority has confirmed that from 1 April 2027 the full-day charge rises to $9.00 and the part-day charge to $4.50. Operators are legally required to advertise the charge honestly and to show it clearly in the total price, so if you cannot find it anywhere in a quote, ask. Beyond that charge, expect the usual extras: wetsuit or stinger suit hire, introductory dives, guided snorkel tours, underwater photographs and, on some boats, lunch upgrades. A cheap headline price with six paid extras is rarely cheaper than a higher price with everything included.
Charges verified against the Reef Authority on 1 August 2026. The next known change is 1 April 2027.
How to Choose an Operator That Looks After the Reef
There are hundreds of permitted operators on the Great Barrier Reef and they are not all the same. Two independent markers are worth more than any brochure, and you can check both yourself before you book.
High Standard Tourism certification. The Reef Authority awards this to operators that demonstrate a sustained commitment to reef protection, staff training and visitor education. Certified operators are granted longer permits, which tells you the regulator expects them to still be doing it properly in fifteen years. The Reef Authority explains what the certification requires and how to check it on its choosing a high standard tourism operation page.
Master Reef Guides. This is a joint Reef Authority and Tourism Tropical North Queensland programme that trains and accredits the reef’s most experienced guides and storytellers. A boat carrying a Master Reef Guide is a boat where somebody on board can answer a hard question about coral spawning, bleaching or crown-of-thorns starfish without reaching for a script.
Neither marker guarantees a good day out, and neither tells you whether the boat will suit your family. But both are awarded by people with no commercial interest in your booking, which is more than can be said for most of what you will read.
Being Honest About Reef Health
You will read that the reef is dying and you will read that the reef is fine. Neither is a useful answer, and we are not going to pretend we can settle it in a paragraph.
What is true is that the reef is monitored more closely than almost any ecosystem on Earth. The Australian Institute of Marine Science surveys reefs every year through its Long-Term Monitoring Program and publishes an annual summary of coral condition. The Reef Authority publishes reef health updates through the summer and a Reef snapshot after each summer, and it is open about the pressures the reef faces, including marine heatwaves, crown-of-thorns starfish outbreaks, cyclones and water quality.
Two things follow, and both are practical. First, conditions vary enormously between reefs, which is why two visitors who snorkelled different sites in the same week will give you opposite reports. Second, the honest way to answer “is it still worth seeing?” is to look at the current published monitoring rather than at either the tourism industry or a headline.
A note on numbers: we deliberately do not publish coral cover percentages on this page. They change every year, they are frequently quoted years out of date, and the most recent figures at the time of writing come from the 2024/25 Annual Summary Report. When the next Long-Term Monitoring Program summary is published we will review this section rather than leave an ageing figure sitting here. Until then, the links at the foot of the page take you to the current data directly.
Protecting the Great Barrier Reef Australia
The Great Barrier Reef is carefully managed and protected to ensure it can be enjoyed by future generations. Conservation efforts focus on reef health, sustainable tourism and education.
Visitors play an important role by:
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- Choosing responsible tour operators
- Following reef safety and etiquette guidelines
- Respecting marine life and coral systems
Learning about the reef is one of the most powerful ways to help protect it.
Learn more about conservation efforts:
Reef Conservation
Start Your Great Barrier Reef Experience
Learning about the Great Barrier Reef is the first step toward an unforgettable experience. Whether you’re planning your first visit or returning to explore more, understanding the reef helps you choose the experience that’s right for you.
Explore tours, activities and experiences:
Great Barrier Reef Tours
Explore Great Barrier Reef Tours
A Hot Getaways destination. Where Care is Our Compass.
Frequently Asked Questions
Where is the Great Barrier Reef located?
How big is the Great Barrier Reef?
What can you see at the Great Barrier Reef?
What activities can you do at the Great Barrier Reef?
Is the Great Barrier Reef protected?
Do I need to be able to swim to see the Great Barrier Reef?
How far offshore is the Great Barrier Reef and how long is the boat trip?
Is there a fee to enter the Great Barrier Reef Marine Park?
When is the best time of year to visit the Great Barrier Reef?
Is it safe to swim at the Great Barrier Reef?
How long should I wait after diving before flying?
Can I visit the Great Barrier Reef without booking a tour?
Is the Great Barrier Reef still worth visiting?
Sources and Further Reading
Every figure on this page comes from one of the sources below. We have linked to the source rather than paraphrasing it so that you can check our work, and so that you can see the current position rather than the position when this page was written.
- Reef Authority — Fascinating facts about the Great Barrier Reef — Marine Park area, length, width, reef and island counts, and species numbers.
- Reef Authority — Environmental management charge rates — Current per-person charges and the increase scheduled for 1 April 2027.
- Reef Authority — Choosing a high standard tourism operation — What High Standard certification means and how to check an operator.
- Reef Authority — What are Master Reef Guides? — The accreditation behind the reef’s most experienced guides.
- Reef Authority — Reef health — Current reef health updates and the Reef snapshot published after each summer.
- Reef Authority — Threats to the Great Barrier Reef — An open account of the pressures the reef faces.
- Reef Authority — Zoning — What you may and may not do in each part of the Marine Park.
- Reef Authority — Responsible Reef Practices — How to behave around coral and marine life.
- AIMS — Long-Term Monitoring Program — The annual reef-by-reef coral condition surveys.
- AIMS — Annual Summary Report of Coral Reef Condition 2024/25 — The most recent published annual summary at the time of writing.
Every source above was opened and confirmed live on 1 August 2026. Reef health data, the environmental management charge and operator certifications all change over time, and the Reef Authority and AIMS pages linked here will always be more current than this page. If you find something here that is out of date or wrong, please tell us so we can correct it.
