Sea Creatures: Dolphin Trivia Quiz — Enjoyable Three-Choice Questions on Fun Facts

Last updated:2025/4/27

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Started performing in bands in junior high school. Influenced by Japanese rock and UK rock, spent over 10 years continuing band activities while creating original songs. Later began producing Vocaloid tracks using Hatsune Miku, with total plays of released songs surpassing 10,000. Has five years of experience writing for music magazines. Currently works as a music writer, director, and composer, keeping a ground-level perspective on the scene by attending live shows across Japan. Now performs at live houses in Tokyo, showcasing guitar playing centered on acoustic guitar and informed by knowledge of chord analysis and guitar scales. Also writes leveraging a broad knowledge of music genres.

Dolphins are highly popular, with dolphin shows held at aquariums.

Their cute behavior—learning various tricks and getting friendly with people—can be truly soothing.

Some of you may be thinking, “I want to learn more about dolphins” or “I want to know what kind of animals they are.”

In this article, we’ve put together a quiz featuring fun trivia about dolphins.

We’ll ask questions that let you enjoy bits of knowledge, such as the characteristics of dolphins’ bodies and the reasons behind their surprising behaviors.

Try answering this quiz to learn more about dolphins, beloved by people of all ages, from children to adults.

[Sea Creatures] Dolphin Trivia Quiz: 3-Choice Questions (1–10) to Enjoy Fun Facts

Why do dolphins jump?

To signal the herd
To make the skin clean
to escape from predators

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To make the skin clean

One of the main reasons dolphins jump is to clean their skin. By leaping high out of the water and slapping back down forcefully, they remove parasites and grime from their bodies, keeping their skin hygienic.

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What class are dolphins classified into?

birds
reptile
mammal

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mammal

Dolphins are classified as mammals. This is because they possess characteristics of mammals, such as breathing with lungs, maintaining a constant body temperature, and nursing their young with milk. In particular, among marine mammals, dolphins are known for their intelligence and social nature; they have been observed to form pods with strong bonds and to display complex communication abilities.

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What is the top swimming speed of dolphins?

20 km/h
50 km/h
80 km/h

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50 km/h

A dolphin’s top speed varies by species, but it’s said they can reach about 50 km/h. This is the result of adaptations evolved for swift swimming underwater. Their speed-powered leaps above the water and various tricks delight and amaze us.

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Where are dolphins born from?

mouth
caudal fin
dorsal fin

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caudal fin

Dolphins are mammals, but because they live in the water, they give birth in a way that differs from land-dwelling mammals. When a dolphin gives birth, the baby is born tail-first, emerging from the mother’s genital slit near the tail rather than head-first.

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How many teeth do dolphins have?

20 to 40 (items)
80 to 100 (items/bottles/pieces)
150 to 200 (items/bottles/pieces)

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80 to 100 (items/bottles/pieces)

There is individual variation in the number of dolphin teeth, but a typical adult dolphin is said to have about 80 to 100 teeth. A dolphin’s teeth help it firmly grasp prey when hunting.

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