Do you love learning about fish and other aquatic sea life? Is visiting the beach or going on boat rides some of your favorite activities? If so, you will love this ocean quiz.
The ocean makes up nearly three-quarters of the entire planet. This massive body of water is essential for life on Earth. The more we learn about the ocean, the crazier it gets. Home to some incredible plants and animals, learning about the ocean unlocks a deeper understanding of the world around us.
Whether you’re fascinated by coral reef systems or enchanted by the mysteries of the deep sea, you are sure to be challenged by this in-depth ocean trivia quiz. Put your knowledge to the test with these ocean trivia questions and answers.
Once you finish this ocean trivia quiz, try out these other nature quiz topics, such as the rainforest, weather, and plants.
The shell of a sea urchin is called what?
Skin
Shell
Brace
Test
How long is the mid ocean ridge?
30,000km
20.000km
70,000 km
50,000km
What is the largest species of turtle?
Hawksbill
Kemps ridley
Loggerhead
Leatherback
How many eyes has a Scallop?
3
35
1
2
What type of whale appeared in Moby Dick?
Blue
Killer Whale
Humpback
Sperm
How old can crabs live to?
25 years
20 years
13 years
1 year
The Portuguese Man-of War is what?
A turtle
A shopwreck
A crab
A jellyfish
Which fish is the best source of Omega 3
Sardines
Tuna
Red Snapper
Salmon
The pearl symbolises what?
Happiness
Love
Honesty
Loyalty
HMS Coventry was sunk in which conflict?
WW2
The Gulf War
The Falklands
WW1
What is the fastest a tuna can swim?
65kph
60Kph
75kph
70kph
The HMS Cricket sank in which sea?
The Baltic sea
The North sea
The Mediterraean
The Red Sea
The Swordfish can grow to how much?
30lbs
90lbs
50lbs
120lbs
The Clownfish can be found where?
In the middle of the ocean
Near esturies
On the seabed
Near coral
The surmuletus fish is what color?
Blue
Red
Yellow
White
How many tides are there per day?
3
4
1
2
A Rainbow Wrasse is what?
Jellyfish
Squid
Octopus
Fish
Where is the Blowfish normally found?
Off the shores of Australia
Off the shores of Chine
Off the shores of India
Off the shores of South America
The pearl is the gemstone for which month?
February
November
June
August
The Little Tunny is a species of what?
Tuna
Mullet
Cod
Haddock
The Horseshoe Crab belongs to which Genus?
Mammal
Crustacean
Arachnid
Fish
The Basslet is also known as what?
Fairy Basslet
Sweet Basslet
Threeline Basslet
Candy Basslet
How long have sharks been around?
200 million years
400 million years
100 million years
300 million years
Which is the largest creature in the sea?
Dolphin
Blue Whale
Killer Whale
Hammerhead Shark
How many hearts has a squid?
2
1
4
3
How deep can Dolphins swim?
150m
260m
200m
300m
Which is the only fish to have eyelids?
The Seahorse
The Shark
The Pufferfish
The Halibut
Seals detect their prey by using what?
Sound
Smell
Eyesight
Their whiskers
How many legs has an octopus?
8
10
6
4
What is the shallowest ocean in the world?
Indian
Pacific
Atlantic
Arctic
A group of Walrus is called what?
A pack
A mob
A set
A herd
Which octopus is poisonous to humans?
The Sothern Keeled
The Bigeye
The Blue Ringed
The Hammer
What type of ocean water is more dense?
Water near the shore
Equator water
Polar water
None of these
What number of shapes do pearls come in?
4
10
8
6
What is the saltiest sea in the world?
Red sea
North Sea
Black sea
Mediterranean sea
Which sea does the European Eel spawn?
The Mediterranian
The Sargasso sea
The North Sea
The Bay of Biscay
How many years can a Sea Sponge live for?
40
30
10
20
The Hydrophiinae is better known as what?
Red Sea Squid
Boston Lobster
Coral Crab
Sea Snake
The Flounder is what?
A tropical fish
A flat fish
A Llobster
A crab
The Sea Lamprey is native to which ocean?
Pacific
Atlantic
Arctic
Indian
How many species of Stonefish are there?
8
5
3
13
How many species of Pufferfish exist?
30
150
120
240
How many years can a sea otter live?
30
25
40
5
Scampi is a form of what?
Lobsters
Fish
Crab
Shrimps
The Hewett oil field is in which ocean?
Arctic
Atlantic
Indian
Pacific
Oysters are rich in which vitamin?
All of these
D
A
C
The Agukhas current is in which ocean?
Indian
Atlantic
Arctic
Pacific
What is the fastest fish in the ocean?
Flying fish
The salifish
Swordfish
Blue Marlin
How many species of sea turtle are there?
21
11
7
4
What is the largest sea fish?
Bluefin Tuna
Great White Shak
The Blue Whale
Whale shark
A group of dolphins is called what?
Pod
Mob
Pack
Set
Where does a benthic fish live?
On the seabed
On the surface of the sea
On the rocks
On the sand
The Meriam is better known as what?
Hawaiin Sea Otter
California sea otter
Oregon Sea Otter
Alaskan Sea Otter
Which fish has associations with royalty?
Queen Coris
Prince Coris
Princess Coris
King Coris
The Fionaven Oilfield is located where?
Near the Shtland Islands
Off the Coast of The Netherlands
Off the coast of Norway
Off the coast of Scotland
Which sea creature produces Calamari?
Clams
Squid
Fish
Octopus
The Whiting can be found in which ocean?
Arctic
Indian
Pacific
Atlantic
What is a Sand Smelt?
Fish
Squid
Lobster
Crab
What is the world’s deepest Oil platform?
Bulwinkle
Tombua
Baldpate
Petronius
The Barreleye fish is also known as what?
The Ghost Fish
The Spider Fish
The Devil Fish
The Spook Fish
The Stary Smooth Hound is a type of what?
Sharl
Seal
Crab
Lobster
The anal fin can be found where on a fish?
Tail
Upper back
Head
Lower back
What is the oldest a seahorse can live?
4 years
2 years
5 years
1 year
How many clams can a walrus eat in a day?
200
400
600
800
The name for the study of fish is what?
Pisctory
Fishology
Marinology
Icthyology
A pearl is produced inside a what?
Clam
Lobster
Squid
Crab
A cod can live up to what age?
25 years
15 years
20 years
10 years
A Sea Sponge is which of these?
Animal
Plant
Rock
Coral
How many hearts has an octopus got?
3
1
2
4
Pearl farming is known as what?
Dericulture
Periculture
Fericulture
Tericulture
The Yellowtail is a species of what?
Whale
Shark
Barracuda
Dolphin
A penguin can swim up to how many mph?
10
25
20
15
What is the average length of a sea snake?
4m
1m
3m
2 m
What color is the Beluga whale?
White
Blue
Grey
Green
How many hearts does an octopus have?
4
2
1
3
How large are the Giant Squid’s eyeballs?
The size of a tennisball
The size of a golfball
The size of pea
The size of a basketball
How long can a dolphin stay under water?
15mins
10mins
5mins
20mins
How many types of sea urchin are there?
400
100
300
200
How long can a Barracuda grow in length?
6 ft
4 ft
5 ft
3 ft
Which of the following is a sea creature?
Sea Sprout
Sea Cucumber
Sea Carrot
Sea Turnip
Japanese seafood dishes are called what?
Fushi
Sushi
Gushi
Ryiushi
Which country consumes the most Tuna?
Spain
Japan
Italy
Indian
Cuttlefish have what color blood?
Clear
Red
Green
Yellow
What color is the snapper fish usually?
Red
Yellow
Black
Green
Which shark has associations with a drink?
Beer Shark
Coffe Shark
Water Shark
Milk Shark
How many pairs of legs does a crab have?
6
5
3
4
At what depth does the Dragonfish live?
2 km
1.5 km
1 km
1.3 km
How long have jellyfish been in the seas?
800 million years
500 million years
200 million years
650 million years
Bowie Seamount is what?
Fish
Undersea volcano
Lobster
Crab
Which of the following do octopuses lack?
Eyes
Kidney
Heart
Bones
How many species of Cod are there?
3
6
7
12
A group of crabs is called a what?
Army
Flute
Swarm
Cast
Santorini is what?
Crab
Undersea volcano
Shrimp
Squid
The Equatorial current is in which ocean?
Indian
Pacific
Arctic
Atlantic
What are Basalts?
None of these
Volcanic erruptions in the sea
Volcanic ash in the ocean
Volcanic rocks on the seabed
Where is the blowhole of a whale located?
Before the rear fins
Underneath
On its back
On its head
How many species of Puffer Fish are there?
120
10
100
43
What color are the spots on a Plaice?
Red
Black
Yellow Bellied
Blue
The Swordfish hunts at what time of day?
Dawn
Night
Dusk
Day
The ‘Ghost Ship’ wreck lies in which sea?
The South China sea
The Baltic sea
The Red Sea
The North sea
How many species of Clownfish exist?
12
45
50
28
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