All 13 questions
Prefer reading to playing? Here is every question of this quiz — answers come with your score.
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What is the largest animal known to have ever lived on Earth?
- African elephant
- Giant squid
- Blue whale
- Great white shark
-
How many hearts does an octopus have?
- Two
- One
- Three
- Eight
-
Whales and dolphins are fish.
- True
- False
-
The Great Barrier Reef, the world's largest coral reef system, lies off the coast of which country?
- Australia
- Mexico
- Brazil
- Indonesia
-
What is the deepest known point in the world's oceans?
- Mariana Trench
- Java Trench
- Puerto Rico Trench
- Tonga Trench
-
A jellyfish has no centralized brain; instead it relies on a diffuse nerve ___ to detect touch, light, and chemicals in the water.
-
Sharks are a type of fish.
- True
- False
-
A group of fish swimming together in a coordinated way is commonly called a what?
- Flock
- Pod
- Herd
- School
-
Which is the largest living species of fish in the ocean today?
- Basking shark
- Manta ray
- Whale shark
- Great white shark
-
Because they are not actually fish, biologists increasingly prefer to call a starfish a sea ___.
-
How do dolphins primarily locate prey and navigate in dark or murky water?
- Electroreception
- Bioluminescence
- Camouflage
- Echolocation
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The giant squid is one of the largest invertebrates known, growing to lengths of around 12 meters or more.
- True
- False
-
Corals, jellyfish, and sea anemones all belong to which group of animals, known for their stinging cells?
- Crustaceans
- Mollusks
- Echinoderms
- Cnidarians