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Coral Reefs treasure hunt

Coral reefs are among the most colourful and biodiverse ecosystems on Earth. With our GPS treasure hunts, you will discover the secrets of these underwater paradises, learn about the fascinating symbiosis between coral and algae, and experience why these reefs are so crucial for marine life.

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Made 2 days ago: Enkhuizen city walk in Enkhuizen

Coral Reefs treasure hunt - GPS treasure hunt Nature

Available nature treasure hunts (5)

Start location

Natuur in de Stad

Groningen, Groningen, Netherlands
Fiets langs de mooiste groene plekken van Groningen. Ontdek parken, vijvers en stadsbossen waar je midden in de stad to…
Natuur 9-10 year
40 min 4,0 km 10 3
Start location

Strand en zee ontdekken

Den Haag, Zuid-Holland, Netherlands
Een leuke speurtocht langs het strand en de boulevard van Scheveningen. Leer alles over de zee, schelpen en zeedieren!
Natuur 9-10 year
40 min 1,8 km 10 13
Start location

Natuur en dieren bij Kijkduin

Den Haag, Zuid-Holland, Netherlands
Pak je fiets en ontdek de prachtige natuur rond Kijkduin. Van duinen tot bossen, van zeevogels tot konijnen - de natuur…
Natuur 9-10 year
55 min 6,0 km 10 3
Start location

Natuur in het Kralingse Bos

Rotterdam, Zuid-Holland, Netherlands
Een leuke speurtocht voor de allerkleinsten door het mooie Kralingse Bos! Kijk goed om je heen naar bomen, bloemen, een…
Natuur 5-6 year
35 min 1,3 km 10 2
Start location

Natuur ontdekken in het Vondelpark

Amsterdam, Noord-Holland, Netherlands
Een leuke speurtocht door het Vondelpark voor de allerkleinsten! Tel eendjes, zoek bloemen en ontdek de natuur om je he…
Natuur 3-4 year
40 min 1,5 km 10 5

Featured this week: example questions for Coral Reefs

New example questions from the library every Monday. Updated on 12 October 2026.

Which fish can walk on the bottom?
Lionfish Clownfish Blue pliers Angelfish
Which animal has a soft exterior?
Sea anemone Sea urchin Crab Coral
How does a jellyfish swim?
By pumping With his paws With its fins With its tail
Where do sea turtles lay their eggs?
On the beach In the water In a tree In a den
Which animal can play hide-and-seek really well?
Octopus Shark Dolphin Whale
How does sand feel on the seabed?
Soft Hard like stone Cold like ice cream Warm like fire
What does a fish breathe?
Water Air Sand Coral
What shape is a sunflower starfish?
Like a flower Like a ball Like a cube Like an egg
Create a coral reefs treasure hunt for Ages 3-4
Why do many coral reef fish have such beautiful colors?
To recognize each other To party To dance To look pretty
What kind of teeth does a parrotfish have?
Like a parrot's beak Very tiny teeth No teeth Golden teeth
How long does it take for coral to grow?
A very long time A day An hour A minute
What do fish do at night?
Sleep Dance Sing Play
What else do sea turtles eat besides seagrass?
Jellyfish Candy Bread Ice cream
What is the biggest animal in the sea?
Blue whale Clownfish Starfish Crab
Which animal looks like a flower but is actually an animal?
Sea anemone Starfish Crab Fish
What does a shark have lots of in its mouth?
Sharp teeth A long tongue Little pebbles Soft little cushions
Create a coral reefs treasure hunt for Ages 5-6
What shape does a typical coral island have?
Round with water inside Square Triangular Star-shaped
What are polyps in a coral reef?
Tiny animals that make corals Big fish Sea plants Stone
Why are coral reefs different at night than during the day?
Other animals emerge They go to sleep They disappear They get bigger
What colour do clownfish usually have?
Orange with white stripes Green with red dots Blue with yellow circles Black with purple lines
What happens when the water gets too warm for corals?
They get sick They grow faster They get bigger They get more colours
What large animal sometimes swims across coral reefs?
Whale Shark Elephant Bear Horse
How much time does it take for a coral reef to grow?
Very many years One week One month One day
How do corals feel when you gently touch them?
Hard and rough Soft and fluffy Slippery and slippery Warm and dry
Create a coral reefs treasure hunt for Ages 7-8
Which continent has the fewest coral reefs?
Antarctica Asia Australia Africa
How many people worldwide depend on coral reefs for food?
More than 500 million About 10 million About 1 million About 100,000
What is coral bleaching?
Corals turn white and die Corals darken Corals grow faster Corals get bigger
How long does it take for a coral reef to grow completely?
Thousands of years A few weeks One year Ten years
What is a coral polyp?
A small sea creature A sea plant A type of algae A piece of stone
What percentage of all marine fish live part of their lives near coral reefs?
About 25% About 5% About 50% About 75%
Which species of shrimp often lives with sea anemones?
Polish shrimp North Sea shrimp Crayfish Freshwater shrimp
Approximately how many different types of coral exist?
More than 800 About 50 About 10 About 100
Create a coral reefs treasure hunt for Ages 9-10
Which fish make a kind of nest out of sand and stones?
Some pipefish Clownfish Doctor fish Parrotfish
Which shrimp often live with sea anemones?
Anemone prawns Coral Angels Sand prawns Deep-sea prawns
Which fish eat corals and turn them into sand?
Parrotfish Clownfish Doctor fish Butterflyfish
What temperature does seawater need for coral growth?
18-30 degrees Celsius 0-10 degrees Celsius 35-50 degrees Celsius 10-15 degrees Celsius
Which shark is harmless and eats mostly small fish?
Reef shark Tiger shark White shark Hammerhead shark
What small animals do corals actually consist of?
Polyps Lobster Starfish Crabs
Which corals can light up at night?
Fluorescent corals Brain corals Table corals Tube corals
What happens when corals get too warm water?
They emit their algae and turn white They grow faster They get more colours They are making more babies
Create a coral reefs treasure hunt for Ages 11-12
How long does it take for a coral reef to fully recover after bleaching?
10-15 years 1-2 years 50-100 years 6 months
Which starfish is a major threat to coral reefs?
Crown of Thorns Starfish Sun Star Snake star
When do corals usually take place their reproduction?
At full moon At new moon By day In stormy weather
On average, how many centimetres per year is sea level rising due to climate change?
3.3 millimetres 1 centimetre 5 centimetres 1 millimetre
What symbiosis do corals have with algae?
Mutualism Parasitism Commensalism Competition
What is the minimum temperature required for coral reefs to grow?
20°C 15°C 25°C 30°C
What happens when the acidity of the ocean increases?
Corals find it harder to form their skeletons Corals grow faster Corals get bigger Corals get more colour
What factors can cause coral bleaching?
All of the above Temperature rise only Pollution only Only acid rain
Create a coral reefs treasure hunt for Ages 13-14
What method is used for coral restoration where coral fragments are grown on structures?
Coral gardening Coral seeding Coral farming Coral planting
What technique is used to culture coral larvae in laboratories?
Ex-situ larviculture In-vivo transplantation Cryogenic preservation Hydroponic cultivation
What factor mainly determines the success of coral transplantation?
Genetic compatibility with the environment Size of the fragment Time of year Water depth
What innovative technique is being used to make corals more resistant to bleaching?
Selective breeding of heat-tolerant strains Chemical treatment Irradiation with UV light Cooling systems
How many tentacles do most coral polyps have?
6 or multiples of 6 8 or multiples of 8 4 or multiples of 4 10 or multiples of 10
What happens to corals during an El Niño event?
Massive coral bleaching caused by warmer waters Accelerated growth Increased reproduction Nothing special
Which crab lives in symbiosis with corals?
Crab Hermit crab Blue swimming crab Beach crab
What is the main cause of ocean acidification threatening coral reefs?
Absorption of CO2 from the atmosphere Industrial discharges Fertiliser runoff Oil pollution
Create a coral reefs treasure hunt for Ages 17-18
At what depth do most coral reefs grow?
0-50 metres 50-100 metres 100-200 metres 200-300 metres
What is the average lifespan of a coral colony?
Hundreds to thousands of years 5-10 years 50-100 years 10,000 years
What is the disease called that causes white circular spots on coral?
White Plague White Pox White Syndrome White Spot
Which type of coral does not have a hard skeleton?
Soft corals Table corals Brain corals Staghorn corals
Between which latitudes are the most coral reefs located?
30°N and 30°Z 45°N and 45°Z 60°N and 60°Z 15°N and 15°Z
What depth is optimal for most reef-building corals?
0-40 metres 40-80 metres 80-120 metres 120-200 metres
What are the small opening in coral polyps called where food enters?
Mouth/stomach cavity (Coelenteron) Stomata Ostiole Spiracle
What is the name of the area around a coral island where the coral reef is located?
Lagoon Barrier Plateau Basin
Create a coral reefs treasure hunt for Ages 18+

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Frequently asked questions

A Coral Reefs scavenger hunt is a GPS-guided outdoor activity with quiz questions about Coral Reefs, part of the theme Nature. You walk a route past various locations and answer fun questions along the way.

There are 7450 questions available about Coral Reefs: 7450 multiple choice questions, 0 open questions and 0 assignments. The category Nature has more than 134643 questions in total.

There are Coral Reefs questions for all ages: from 3-5 years (toddlers) to 20+ (adults). The questions are automatically adapted to the chosen level.

Go to oppatt.io, create a free account, choose the theme Nature and select Coral Reefs as the topic. Choose an age category and location, and you'll have a complete scavenger hunt within a minute.