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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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Next you pick the location(s) and select questions, your own or ours. 194.498 questions to choose from.

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.

What colour does an octopus turn when scared?
Dark Pink Yellow White
Which animal has tentacles?
Squid Fish Crab Starfish
How big is a clownfish?
Small As big as a car As big as a house As big as a tree
What does a starfish eat?
Small animals Grass Leaves Apples
Which animal can spray inky black?
Octopus Fish Crab Starfish
Where do coral reefs live?
In warm sea In cold sea On the beach In the air
What does a sea turtle eat?
Seagrass Biscuits Milk Candy
Which fish has big eyes?
Soldiers fish Shrimp Crab Coral
Create a coral reefs treasure hunt for Ages 3-4
What does a shark have lots of in its mouth?
Sharp teeth A long tongue Little pebbles Soft little cushions
Which animal looks like a flower but is actually an animal?
Sea anemone Starfish Crab Fish
What do some fish make when they talk?
Little sounds Little lights Music Drawings
Which animal has an inkwell inside its body?
Octopus Fish Crab Starfish
What happens if you break off a starfish's arm?
It grows back It gets sick It starts crying It gets angry
Where does a clownfish like to live?
Among sea anemones In a tree In the sand On the beach
What color are many corals?
Brightly colored Only black Only gray Transparent
What does a starfish like to eat?
Coral Grass Leaves Bread
Create a coral reefs treasure hunt for Ages 5-6
Which animal can change colour and has eight arms?
Octopus Starfish Crab Shrimp
What do corals do during the day?
They make food with sunlight They sleep They swim around They hide
What do corals need to grow well?
Sunlight Rain Snow Wind
How do dolphins communicate with each other?
With sounds and clicks With colours With scents With signs
What does it mean when a coral 'bleaches'?
It turns white and sick It will be extra nice It is going to grow It gets babies
How old can coral reefs get?
Thousands of years A few days A few weeks A few months
What colour do corals often have?
Red and orange Black and white Grey and brown Purple and silver
What colour do corals turn when they get sick?
White Black Green Yellow
Create a coral reefs treasure hunt for Ages 7-8
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
Which fish is known for its bright colours and lives among corals?
Clownfish Shark Tuna Salmon
Approximately how many different types of coral exist?
More than 800 About 50 About 10 About 100
How many people worldwide depend on coral reefs for food?
More than 500 million About 10 million About 1 million About 100,000
Which continent has the fewest coral reefs?
Antarctica Asia Australia Africa
What is a coral polyp?
A small sea creature A sea plant A type of algae A piece of stone
How long does it take for a coral reef to grow completely?
Thousands of years A few weeks One year Ten years
Create a coral reefs treasure hunt for Ages 9-10
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
Approximately how many species of fish live on coral reefs?
More than 4,000 About 100 About 500 About 1,000
Which corals can light up at night?
Fluorescent corals Brain corals Table corals Tube corals
Which fish have remarkably flat bodies?
Rays Murenes Seahorse Puffer fish
Which shells sometimes have beautiful pearls?
Pearl oysters Snail shells Starfish Crab scissors
What do most coral polyps eat at night?
Plankton Seaweed Small fish Sand
Which shrimp often live with sea anemones?
Anemone prawns Coral Angels Sand prawns Deep-sea prawns
Which fish make a kind of nest out of sand and stones?
Some pipefish Clownfish Doctor fish Parrotfish
Create a coral reefs treasure hunt for Ages 11-12
What property makes coral reefs so important for coastal defence?
They break wave energy They absorb salt They produce oxygen They attract fish
What factors can cause coral bleaching?
All of the above Temperature rise only Pollution only Only acid rain
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 form of coral reef completely surrounds an island?
Atoll Franjerif Barrier reef Table reef
What is the pH of seawater in healthy coral reefs?
8,2 7,0 6,5 9,0
When do corals usually take place their reproduction?
At full moon At new moon By day In stormy weather
Which starfish is a major threat to coral reefs?
Crown of Thorns Starfish Sun Star Snake star
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
Create a coral reefs treasure hunt for Ages 13-14
What role do crypto-benthic fishes play in coral reef ecosystems?
Important link in food chain despite small size Main predators of coral polyps Primary coral builders Parasitic organisms
At what water temperature does coral bleaching usually occur?
Above 29°C for prolonged periods Below 20°C Between 15-18°C Above 35°C
What is the main cause of ocean acidification threatening coral reefs?
Absorption of CO2 from the atmosphere Industrial discharges Fertiliser runoff Oil pollution
What time of year is coral spawn season in most tropical regions?
After the hottest months During the coldest months All year round Only in winter
What is an atoll?
An annular coral reef around a lagoon An underground coral reef A floating coral reef A vertical coral reef
What is the main function of nematocysts in corals?
Prey capture and defence Propagation Oxygen production Calcium secretion
What phenomenon causes some coral reefs to be a different colour at night?
Night-time fluorescence Temperature variation Changing oxygen levels Nighttime algae growth
What is the scientific name for the group in which corals are classified?
Cnidaria Porifera Mollusca Echinodermata
Create a coral reefs treasure hunt for Ages 17-18
What is the main function of mucus produced by coral?
Protection against germs Catching food Communications Propagation
What technique do scientists use to breed corals?
Fragmentation and merger Genetic modification Cryopreservation Cloning
What CO₂ concentration in the atmosphere is considered critical for coral reefs?
450 ppm 350 ppm 500 ppm 400 ppm
Which form of reproduction is most common in corals?
Sexual reproduction Button formation Fragmentation Cloning
On average, how long do coral larvae (planula) float in the water column before they attach?
3-7 days 1-2 weeks 3-4 weeks 1-2 months
What time of year is the spawning season for most Caribbean corals?
August-September February-March November-December May-June
What is the smallest reef-building coral species?
Leptoseris species (a few millimetres) Porites species Acropora species Favia species
What innovative method is used for coral restoration?
Biorock electric accretion technology Genetic cloning Radioactive irradiation Chemical stimulation
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.