Dive into the Vibrant Waters of the Great Barrier Reef
This sprawling coral reef system is one of the most biologically diverse places on the planet.
You can spend a lifetime exploring the Great Barrier Reef and still not see all of this colorful coral realm—it’s nearly the size of Montana. Sprawling off the east coast of Queensland, Australia, the Great Barrier Reef is not a single reef but a group of more than 2,800 distinct entities. It stretches over 1,250 miles (2,000 kilometers) north to south and covers some 135,000 square miles (350,000 square kilometers) in total.
The reef system is the largest structure on Earth built by living organisms, tiny hard corals that are no bigger than a fingernail. When corals die in countless numbers their limestone-secreted skeletons build upon one another to form the bedrock of the reef. The magnificent structures we see today were produced by a slow process played out over millions of years. Reefs grow only about half an inch (1.3 centimeters) a year.
Some 2,000 different fish species have been identified on the Great Barrier Reef, and new ones are found each year. Scientists estimate that the reef is home to 4,000 mollusk species and over 250 different shrimp species. Even the corals that construct the reef itself are diverse—numbering some 400 species.
This colorful aquatic ecosystem is home to a staggering diversity of plant and lower animal life but is also frequented by larger species like dugongs, sea turtles, sharks, and dolphins.
In order to protect these biological treasures, the Great Barrier Reef Marine Park was designated a World Heritage site in 1981. Some two million tourists visit the Great Barrier Reef each year, driving an eco-economy that generates billions of dollars annually. But in recent years, the reef has suffered unprecendented coral bleeching. [Related: Tourists Try to See Great Barrier Reef Before It's Gone]
World Heritage Site Pictures: Great Barrier Reef
How to Get There
Most day trips to the reef leave on boats from coastal centers like Cairns or Port Douglas. Most of the reef is dozens of miles offshore and must be reached by boat journeys of one to several hours.
When to Go
The Great Barrier Reef lies in tropical waters where temperatures are warm enough to offer enjoyable swimming and diving year round—though averages can vary 10°F (5.5°C) from winter to summer. Peak tourism time on the reef is April through November, but even in winter ocean water temperatures typically top 72°F (22°C). Daytime temperatures during the summer months (December to March) can be quite hot—particularly in the northern regions of the reef.
How to Visit
High-speed catamarans take day-trip visitors to the reef, often docking at special base camp platforms equipped for snorkeling, diving, or exploration via glass-sided semi-submersibles. Other boat tours, including sailboats, provide a more leisurely experience. Private charters are available for snorkeling, diving, whale watching, or fishing adventures—including overnight live-aboard vessels for journeys to more remote locations. Aircraft and helicopter flights offer a bird's-eye view of the massive reef system, much of which lies close to the surface in clear, warm waters.
Related Topics
You May Also Like
Go Further
Animals
- This ‘saber-toothed’ salmon wasn’t quite what we thoughtThis ‘saber-toothed’ salmon wasn’t quite what we thought
- Why this rhino-zebra friendship makes perfect senseWhy this rhino-zebra friendship makes perfect sense
- When did bioluminescence evolve? It’s older than we thought.When did bioluminescence evolve? It’s older than we thought.
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
Environment
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
- Listen to 30 years of climate change transformed into haunting musicListen to 30 years of climate change transformed into haunting music
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- U.S. plans to clean its drinking water. What does that mean?U.S. plans to clean its drinking water. What does that mean?
History & Culture
- Séances at the White House? Why these first ladies turned to the occultSéances at the White House? Why these first ladies turned to the occult
- Gambling is everywhere now. When is that a problem?Gambling is everywhere now. When is that a problem?
- Beauty is pain—at least it was in 17th-century SpainBeauty is pain—at least it was in 17th-century Spain
- The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’
- Heard of Zoroastrianism? The religion still has fervent followersHeard of Zoroastrianism? The religion still has fervent followers
Science
- Here's how astronomers found one of the rarest phenomenons in spaceHere's how astronomers found one of the rarest phenomenons in space
- Not an extrovert or introvert? There’s a word for that.Not an extrovert or introvert? There’s a word for that.
- NASA has a plan to clean up space junk—but is going green enough?NASA has a plan to clean up space junk—but is going green enough?
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- Can aspirin help protect against colorectal cancers?Can aspirin help protect against colorectal cancers?
Travel
- What it's like to hike the Camino del Mayab in MexicoWhat it's like to hike the Camino del Mayab in Mexico
- Follow in the footsteps of Robin Hood in Sherwood ForestFollow in the footsteps of Robin Hood in Sherwood Forest
- This chef is taking Indian cuisine in a bold new directionThis chef is taking Indian cuisine in a bold new direction
- On the path of Latin America's greatest wildlife migrationOn the path of Latin America's greatest wildlife migration
- Everything you need to know about Everglades National ParkEverything you need to know about Everglades National Park