
Although the spiny, horrifying outside may scare you off, the insides of a sea urchin are one of the most delicious things to come out of the ocean. In Japan, sea urchin, or uni in Japanese, can be enjoyed with sushi, on top of rice or just own its own. Sea urchins are a treat for any seafood fan, but recently a group of Japanese netizens found out a little bit more about the life of the sea creature and began a deep discussion about the spiny little critters.
After finding out that some sea urchins can live for over 200 years, netizens started a thread on a popular site to express their amazement at the animal’s long lifespan. The discussion was apparently brought on by a book called “The Science of Sea Urchins.” Written by biologist Tatsuo Motokawa, the almost 500-page book details the life cycle, eating habits and anatomy of sea urchins. Though the subject may sound dry, it’s worth noting that Professor Motokawa is also known as the “Singing Scientist” and has had songs, such as Living Creatures are Columns, featured on Japanese TV.
▼ The Singing Scientist doing his part to liven up the world of biology

Although not all sea urchin species have such long lifespans, netizens were still impressed to find out just how long these little spiny guys could live. Out of the about 950 species, the red sea urchin is the one that seems to have one of the longest lifespans and are also one of the largest species of sea urchins. And not even all red sea urchins live that long. They are found all along the western coast of North America and it looks like those who make their home in Canada are the ones living the longest.
▼ This red sea urchin probably isn’t going anywhere for a while

The Internet had a lot of questions about sea urchins with their newfound knowledge, such as pondering the moral implications of eating such an ancient sea creature or whether the long-lasting sea urchins actually enjoy their 200 years of eating mainly algae. Some netizens envied how much some urchins were able to “see” in their long lives and some even thought it would be great to be reincarnated as a sea urchin for their next life. Although the true heart of the thread were the puns netizens threw around to talk about how unbelievable this sea urchin fun fact was.
Doesn’t matter how many times I hear it, sounds really FISHY to me!
How SHELLFISH would it be to eat such an ancient living being.
This new discovery really SHARKED me!
If that were me, I would be in the SEA, URGIN’ for a more exciting life.
Call me a JELLYFISH, because I want to live 200 years.
Although most of these netizens didn’t seem like they would be giving up eating their precious sea urchins, they did appear to have new respect for the spiky animal. While it doesn’t look like all sea urchins live as long as their red sea urchin cousins, it should make you appreciate a little more the impressive work of Mother Nature that goes into a delicious sushi meal.
Feature Image: Yahoo! Japan Shopping
Source: Mudai Document

We try a rotating sushi chain’s super high-quality 3-layer caviar, sea urchin & fatty tuna sushi
Sea urchins will fight over the same piece of cabbage, Japan is adorably shocked to learn
Funny reaction video shows Americans trying sea urchin for the first time
In search of the elusive Sea Urchin Butter from Kaldi【Taste test】
Bizarre deep-sea shrimp or delicious sushi? Japanese netizens weigh in
12-year-old foreign tourist missing in Japan, police asking for help finding her [Video]
Study finds hundreds of people in Indonesia legally named after Naruto, Inuyasha, other anime stars
Japanese airlines set to cut fuel surcharges for international flights in September and October
The Japanese city where ordering grilled chicken doesn’t guarantee you’ll actually get chicken
Google’s first Google Store outside the U.S. is now open in Tokyo
Delta Airlines adds first nonstop flight between Japan’s Narita Airport and U.S. in seven years
Ride a tram that survived the atomic bombing of Hiroshima on a new limited-time history tour
Pokémon donuts are coming to Krispy Kreme in the U.S. [Photos]
Studio Ghibli adds new Jiji’s baby plush toy to its anime merchandise range in Japan
Hello Kitty x Godzilla Happy Meals are coming to McDonald’s, but not in Japan [Video]
Japanese toilet aims to attract foreign tourists but not everybody is happy about it
New Japanese vending machine at Shinkansen station sells cups of ice on platform
Japan’s new beer glass is designed to force you to drink…water [Video]
End of a manga era as Weekly Shonen Jump’s circulation drops under one million
Anime fan in Japan arrested for ordering and cancelling over 4.3 billion yen in anime merch
Beautiful Totoro bonsai figure needs no watering, makes soothing rain showers whenever you want
This beautiful rural Japan river is a great alternative to touristy summer retreats [Photos]
Beautiful off-the-beaten-path spot near samurai castle in rural Japan looks like a Monet painting
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japan now has human refrigerators inspired by Japanese vending machines
Hatsune Miku collaborates with Hokusai’s art in new Vocaloid ukiyo-e illustration series [Pics]
New Shinkansen luggage drop-off system begins in Japan, making train travel even easier
Studio Ghibli releases anime T-shirts that pay homage to one of Hayao Miyazaki’s most personal films
Air-conditioned dress shirts arrive in Japan to save working professionals from sweltering heat
Japanese Shinkansen becomes an overnight hotel for three nights this summer
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
99-year-old woman rescued while attempting to climb Mt. Fuji
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Weird Japanese vending machine comes with a heartwarming twist
Creepy creatures from the seabed that you can eat!【Taste Test】
Japanese retailer Felissimo brings cute from the oceans with adorable deep sea creature pouches
Get this molting crab plushie from Felissimo for the sea creature fan in your life
Japanese sea slugs found to remove their own heads and grow new bodies from them
Japanese museum celebrates Golden Week by publicly dissecting rare sea creature 【Photos】