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Sea Animals
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Which fish is also known as blowfish?
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Pufferfish
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Salmon Fish
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Hermit Crabs
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Sea Horse
Explanation
Pufferfish are some of the most unique fish out there. Pufferfish can blow themselves up like a balloon. They do it as a defense mechanism when they are threatened.
Which marine mammals have the thickest coat of fur?
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Sea Otters
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Polar Bears
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Fur Seals
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Sea Lions
Explanation
The thickest fur among all animals is that of the sea otter. Sea otters depend on their fur to insulate themselves against water, unlike other mammals with a blubber layer for protection.
Which sea animal's call is the loudest on the Earth?
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Blue whale
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Narwhal
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Porcupine
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Tiger Shark
Explanation
The call from a blue whale can be heard from a distance as far as 160 kilometers (100 miles) and makes a noise at 180 decibels, making it the loudest call on the Earth.
How does a sea cucumber defend itself?
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Throws up
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Camouflage
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Hides in crevices
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Secretes ink
Explanation
The defense mechanism of a sea cucumber is such that it can mutilate its body. The sea cucumber rapidly contracts and relaxes its muscles and ejects its internal organs through its anus. The missing body parts are quickly regenerated.
Which group of fish are seahorses closely related to?
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Pipefishes
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Sargassumfishes
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Batfishes
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Sea robins
Explanation
Although they don’t resemble each other, Seahorses are closed related to Pipefish. Both fish fall under a common scientific family Syngnathidae. Seahorses are unique in having fathers care for their children. The male seahorse has a special pouch called a brood pocket, where the impregnated eggs are kept until they are born.
The stinging cells of a jellyfish are also called?
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Cnidocytes
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Nematocysts
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Colloblasts
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Cyanocysts
Explanation
The stinging cells of the jellyfish are called Cnidocytes. Mini needle-like stingers are present in the Cnidocytes that have compartment-like appearances. As their name suggests, jellyfish don’t have a skeleton. Instead, the bell must be firm enough to resist pressure and strong enough to float with a low density.
What is the fastest fish in the world?
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Sailfish
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Mako shark
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Wahoo
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Yellowfin tuna
Explanation
Istiophorus or sailfish is regarded as the fastest fish in the world as it can swim at a speed of 100 km/h (62 mile/h). The striped marlin is the second fastest fish with a speed of 60 km/h (37 mile/h).
Where is the heart of a shrimp located?
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Thorax
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Tail
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Head
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Stomach
Explanation
The heart of a shrimp is present on its thorax, but since a single exoskeleton covers its head and the thorax it is often mistaken that the heart lies in the head.
What’s the largest species of dolphin?
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Orca
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Amazon River Dolphin
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Bottlenose Dolphin
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Spinner Dolphin
Explanation
The largest member of the dolphin family is the killer whale or orca as it is popularly known. The pilot whale is the second-largest member of the dolphin family. Orcas will swim along coastlines and hunt in groups. They will also eat alone if unsuccessful in capturing food at that time.
Narwhals are known as the unicorn of the sea. What is their tusk made from?
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An overgrown canine tooth
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Unicorn dust
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Hardened skin
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Muscles
Explanation
The tusk of the Narwhal is an overgrowth of its canine teeth. Narwhals are known to change color with age and are mostly found in Arctic waters. Narwhals are a species of marine mammals. Their tusks are long and spiral-shaped, and they’re always growing!
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