Facts about the Great Barrier Reef

1. 13

   Sea turtles migrate thousands of kilometers across the Indian and Pacific Oceans to nest on Great Barrier Reef beaches, with some individuals returning to the same beach every 3-4 years.

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2. 12

   Approximately 215 species of sharks and rays inhabit the Great Barrier Reef, with the reef serving as a critical nursery ground for many threatened species including the scalloped hammerhead.

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3. 11

   Sharks patrol the Great Barrier Reef's waters as apex predators, with over 30 species including wobbegongs, reef sharks, and tiger sharks maintaining ecological balance through population control.

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4. 10

   Parrotfish on the Great Barrier Reef excrete up to 200 kilograms of sand annually per individual, with their waste comprising approximately 70 percent of the reef's white sand beaches.

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5. 09

   Giant clams inhabiting the Great Barrier Reef can grow to 1.2 meters in length and live over 100 years, filtering up to 50 gallons of water daily.

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6. 08

   Seagrass meadows surrounding the Great Barrier Reef sequester carbon at rates up to 35 times faster than tropical rainforests, making them critical climate regulators.

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7. 07

   Each year, the Great Barrier Reef generates approximately 56,000 jobs across tourism, fishing, and related industries in Queensland.

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8. 06

   Roughly 10 percent of all fish species in the world inhabit the Great Barrier Reef's coral structures, creating one of Earth's most biodiverse marine ecosystems.

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9. 05

   Australian Aboriginal people have managed and utilized the Great Barrier Reef ecosystem for over 65,000 years through sophisticated traditional practices and knowledge systems.

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10. 04

    More than 64 million tourists visited Australia's Great Barrier Reef between 1995 and 2017, generating approximately 5.4 billion dollars annually for the regional economy.

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11. 03

    Since 1998, four mass bleaching events have devastated the Great Barrier Reef, with 2016 killing approximately 29 percent of its coral.

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12. 02

    Approximately 25 million years ago, the Great Barrier Reef began forming when coral larvae first colonized the continental shelf off northeastern Australia.

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13. 01

    Covering approximately 344,400 square kilometers, the Great Barrier Reef supports over 1,500 fish species and 400 coral types.

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