[For Seniors] Liven Things Up! Fun Fish Trivia Quiz

toothbrush

The coelacanth is also known as a living fossil, right? I don’t think many people have eaten it, but it’s said to taste like a toothbrush. Most people say it’s really bad. Also, because its fat can’t be digested, eating it can easily make you feel sick.

boxfish

Sakana-kun, who has such extensive knowledge about fish that he has even appeared before a Diet investigative committee. The fish on his trademark hat is a spotted boxfish. In his childhood, when his mother took him to an aquarium to show him octopuses—since he loved them—he reportedly fell in love at first sight with the boxfish.

yellowtail

In Ehime Prefecture, it seems they’re raising yellowtail using chocolate as feed. Chocolate contains polyphenols, which are said to slow discoloration. Since it helps the fish maintain a fresher appearance compared to regular yellowtail, it’s highly valued.

Greenland shark

The Greenland shark is said to be the oldest fish on Earth. Their average lifespan is about 250 years, and one individual as old as 512 years has been found! That far exceeds the human lifespan, doesn’t it? The world of fish is still largely unknown, so imagining what kinds of fish might be out there really sparks the imagination.

Skipjack tuna

Humans are creatures that can’t sleep while moving, but skipjack tuna can sleep even as they swim. In fact, there’s a reason they have to keep swimming to sleep. It’s to take in oxygen. By swimming, skipjack draw water in through their gills, so if they stop swimming, they can’t breathe.

cutlassfish

The hairtail’s shimmering silver appearance is quite striking, isn’t it? That silvery skin contains a substance called guanine. In fact, guanine is used as a pearlescent ingredient in lipsticks. It’s said to be commonly used in natural lipsticks.

to undergo a sex change

Black sea bream are actually all born male! However, when they reach about three years old, most of them change sex and become female. Humans can’t naturally change their sex, so it’s pretty amazing that black sea bream can, isn’t it?