Barrier Reef Ecosystem Knowledge Quiz – Test the Details
This Barrier Reef ecosystem knowledge quiz explores corals, clownfish, sea turtles, dugongs, reef sharks and coral bleaching on Australia's Great Barrier Reef. Ten questions test the details of how this living system works.
Start Barrier Reef Ecosystem Knowledge Quiz
🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds
Size
About how long is the Great Barrier Reef?
Corals
Corals are which kind of living thing?
Partners
Which tiny algae live inside coral and give them color?
Bleaching
What causes coral bleaching?
Spawning
What happens during mass coral spawning?
Turtles
Which turtle species nests on Raine Island in huge numbers?
Mammals
Which sea mammal grazes on seagrass near the reef?
Threats
Which starfish eats coral and causes outbreaks?
Fish
Which fish lives safely among sea anemone tentacles?
Sand
Which fish helps make white sand by eating coral?
Your score
0/10
Scroll down to see the explanation for each question.
Explanations: answer key for all 10 questions
- Q1: About how long is the Great Barrier Reef?
Answer: About 2,300 kilometers
It is made of about 2,900 individual reefs and 900 islands.
- Q2: Corals are which kind of living thing?
Answer: Animals
Corals are tiny animals called polyps that build limestone skeletons.
- Q3: Which tiny algae live inside coral and give them color?
Answer: Zooxanthellae
The algae make food through photosynthesis, which feeds the coral.
- Q4: What causes coral bleaching?
Answer: Heat stress that makes corals expel their algae
Without algae, corals turn white and may starve if heat lasts too long.
- Q5: What happens during mass coral spawning?
Answer: Corals release eggs and sperm together
It usually happens after full moons in late spring and looks like underwater snow.
- Q6: Which turtle species nests on Raine Island in huge numbers?
Answer: Green sea turtle
Raine Island is one of the largest green turtle rookeries in the world.
- Q7: Which sea mammal grazes on seagrass near the reef?
Answer: Dugong
Dugongs are relatives of manatees and can live about 70 years.
- Q8: Which starfish eats coral and causes outbreaks?
Answer: Crown-of-thorns starfish
Divers inject outbreaks to protect important reefs.
- Q9: Which fish lives safely among sea anemone tentacles?
Answer: Clownfish
A slimy coat protects clownfish from the anemone's sting.
- Q10: Which fish helps make white sand by eating coral?
Answer: Parrotfish
Parrotfish bite coral and grind it into fine sand.
Barrier Reef Ecosystem Knowledge Quiz – A Living Structure
The Great Barrier Reef is the largest coral reef system in the world, made up of thousands of reefs along Queensland's coast. It is so large it can be seen from space and is home to thousands of species.
Reefs depend on partnerships. Coral polyps host algae that provide food, fish clean and graze reefs and sea turtles and dugongs feed on seagrass nearby. These links make reefs productive and colorful.
Rising ocean temperatures cause bleaching, which has struck the reef several times since 1998. Scientists, rangers and Traditional Owners work to protect it by improving water quality, managing fishing and studying heat-tolerant corals.
What This Quiz Teaches
This quiz is for divers, students and nature fans curious about reef ecosystems.
- What corals are
- How bleaching happens
- What mass spawning is
- Which animals depend on the reef
- What threatens the reef
Did You Know?
- The reef is a UNESCO site since 1981.
- It is managed as a marine park.
- Manta rays visit Lady Elliot Island.
- Hawksbill turtles eat sponges.
- Reef tourism supports many jobs in Queensland.
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