[For Seniors] Take on Summer! A Collection of Ocean Trivia Quizzes & Fun Facts

Social worker / Care workermoko
My name is Moko, a mother of three who admired my mother and worked in the care industry as a care worker and as a medical social worker (MSW) in a hospital. I will be drawing on my previous experience to write mainly about caregiving. Thank you in advance.

Summer is the perfect season for enjoying the beach.

Some older adults may remember playing in the ocean until it got dark.

Others might have grown up in landlocked prefectures and have memories of the sea from their travels.

In this article, we’ve gathered quizzes and fun trivia about the ocean to try in summer.

It’s packed with questions you might think you know but actually don’t—like why waves form, why seawater is salty, and why the sea looks blue.

The questions are easy multiple-choice, so feel free to join in.

Please make use of them during recreation time!

[For Seniors] Summer Challenge! Ocean Trivia Quiz & Fun Facts Collection (11–20)

Which of the following sea fish lives the longest?

tuna
clownfish
Greenland shark

See the answer

Greenland shark

The Greenland shark is an exceptionally long-lived fish, estimated to be able to live for over 400 years. This places it among the longest-lived of all fish, far outliving most other species. Some individuals are even said to be over 500 years old.

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What is the largest mammal in the world?

Mammals, one category of animal classification, include not only humans but a wide variety of species living all around the world.

Among mammals, what would you say is the largest in the world? It’s a good idea to start by imagining large animals, then expand your thinking by asking whether they’re mammals and whether there might be anything even larger.

The answer is the blue whale.

Even a simple figure—its length of about 25 to 30 meters—clearly conveys its immense size.

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