Ocean creatures, sea life, marine life, or ocean life are the plants, animals, and organisms found in seawater or brackish water. Invertebrates in marine environments have a variety of adaptations to survive in low-oxygen conditions, including breathing tubes like in mollusks. There is no respiratory system in fish, although some species, such as lungfishes, have both. Marine mammals (e.g., dolphins, whales, otters, and seals) require periodic surface visits to breathe. Try this Ocean Creatures trivia quiz and mark the highest score!
1. Largest mammal among ocean creatures?
A. Blue Whale
B. Hammered Shark
C. Killer Shark
D. Dumbo Octopus
2. Which species of penguin is the only species adapted to a hot climate?
A. Royal Penguin
B. Adelie Penguin
C. Galapagos Penguin
D. Fairy penguins
3. Among all these which is Evolutionary adaptations of deep-sea creatures?
A. High pressure
B. Lack of light
C. Bioluminescence
D. All above
4. Which ocean basin has the most coral reefs?
A. Indian
B. Atlantic
C. Pacific
D. Arctic
5. The wandering Albatross is the world biggest seabird. What is the size of its wingspan?
A. 13 feet
B. 12 feet
C. 11 feet
D. 10 feet
6. How many different ways can marine worm reproduce?
A. 16
B. 18
C. 20
D. 21
7. About how many sharks are hunted by people every day?
A. 100 million
B. 200 million
C. 125 million
D. 150 million
8. Which slinky cephalopod is the biggest?
A. Giant Octopus
B. Humboldt Squid
C. Colossal Squid
D. Giant Squid
9. Fastest marine creature?
A. Tiger shark
B. Narwhale
C. Sea krate
D. Sailfish
10. Zooplankton are an important part of almost all marine food webs. In which part of the water column are zooplankton most abundant?
A. abyssopelagic-the briny deep
B. bathypelagic-the briny not-quite-as-deep
C. mesopelagic-the middle zone
D. epipelagic the sunny surface
11. Which marine mammals have the thickest coat of fur?
A. polar bears
B. sea otters
C. fur seals
D. sea lions
12. Which of these marine animals is not a jellyfish?
A. sea nettle
B. comb jelly
C. sea wasp
D. Portuguese man o'war
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