We take a look at thecacera pacifica, known as the “Pikachu sea slug” in Japan, which many say is the real-life inspiration for the Pokémon character.
A couple of weeks ago, Japanese teacher-celebrity Osamu Hayashi introduced viewers to an adorable little sea slug known as thecacera pacifica on his popular Japanese television program Hayashi-sensei ga Odoroku Hatsumimi Gaku, or Professor Hayashi’s School of Surprising Second-Hand Knowledge. What makes this marine creature extra special is its incredible likeness to Pikachu, the star character of the popular Pokémon franchise, and while the species has made news in the past, its recent television spotlight introduced even more people to its unusual appearance, drawing attention to the sweet bright-coloured slug all over again.
ピカチュウウミウシ可愛い(*^^*) pic.twitter.com/ozqEKxbSa2
— こみつ、マタママ(*^^*) (@RJamGwp1Z5ohVpi) August 7, 2016
While die-hard fans of the franchise may have seen this slug before, it’s now captivating even more legions of admirers, particularly those who have recently come to love the series through the hugely popular mobile game Pokémon Go.
https://twitter.com/sazatinn0209/status/758496071538446338The slug’s likeness to the electric Pokémon needs no explanation, with its bright-coloured body and long, pointy black-tipped ears earning it the nickname “Pikachu Sea Slug” in Japan.
ピカチュウウミウシwww pic.twitter.com/rnE0nRyruR
— 爆速 (@BK1TA) July 8, 2016
While the cute critter can be found along coastal regions in Japan like the Izu Peninsula, Bonin Islands, and Yakushima, it also appears on land too, in the form of cute figurines and pendants.
博物フェスにいってきました!
— yukika (@yukika0319) July 24, 2016
ピカチュウウミウシをゲットだぜ! pic.twitter.com/avZQLj86zr
ウミウシ展の準備が終わりました!
— makoron (@makoron3012) August 18, 2016
後は当日を待つだけです!
ウミウシ達も緊張の面持ちです。
当日はマステも持って行きますよー! pic.twitter.com/6W128vRCdN
It’s not common to find sea slugs like these in aquariums, but if you’re in Japan, you can view approximately 25 species at Osaka Aquarium, where they have 120 animals on display.
水中でもポケモンGOできたら楽しいな。ピカチュウウミウシ pic.twitter.com/w05RiiSnwk
— さかな (@chaetodon07) July 17, 2016
With its unusual colouring and otherworldy appearance, the gorgeous thecacera pacifica is not the only creature to invoke an anime doppelgänger in the well-known Pokémon series. To see more Pokémon in the real-world, check out this cute collection!
Source: Spotlight
Top Image: Twitter/@sazatinn0209

Pokémon GO players in Japan discover strange new hybrid species of monsters in the game
Pokémon Go players discover unusual gym locations around Japan
Pokémon Go Trainers in Japan take over parks in huge crowds on first weekend of game’s release
Is Pokémon Go helping prevent deaths at one of Japan’s most notorious suicide spots?
Pikachu cosplayer delights Pokémon Go gamers in Japan
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
One Piece creator has hidden secret of anime treasure’s identity in chest at bottom of real-world ocean
Is Tokyo Station’s startlingly expensive wagyu bento boxed lunch worth its high price?[Taste test]
Chance to play Tetris on a massive staircase in Kyoto Station coming in March
Kyoto raises hotel accommodation tax to fight overtourism, travelers could pay up to 10 times more
Viral Japanese cheesecake from Osaka has a lesser known rival called Aunt Wanda
Starbucks Japan’s new sakura collection arrives in stores for hanami season 2024
Telecommute with Pikachu! Over 250 Pokémon video chat backgrounds now free to download
Tokyo Station staff share their top 10 favorite ekiben
Thailand’s Daiso is so different from Japan’s that they might as well be on different planets
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japanese restaurant chain serves Dragon Ball donuts and Senzu Beans this spring
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 1]
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Japan’s craziest burger chain takes menchi katsu to new extreme levels
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 2]
Japan has only one airport named after a samurai, so let’s check out Kochi Ryoma【Photos】
Japanese drugstore sells onigiri at pre-stupid era prices, but how do they compare to 7-Eleven?
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Japan’s newest Shinkansen has no seats…or passengers [Video]
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
6 things people in Japan should watch out for when Pokémon Go lands in the country
Pokémon Go released in Japan? We spot a rare “Glasses Pikachu” at Tokyo’s Nintendo headquarters
Pokémon Go in Japan: We discover a “Pikachu forest” in Tokyo!
Detective Pikachu debuts in Pokémon GO in event saluting franchise’s first live-action film
China creates its own version of Pokémon Go called “City Spirits Go”
Mewtwo makes long-awaited Pokémon GO debut in Yokohama fan event
Pokéball Aimer 3-D printed iPhone case makes news among Pokémon Go Trainers in Japan
Before Pokémon Go, there was Ingress, and its first “XM-Profiler Illumination Portal” is in Japan
Pokémon Gold and Silver Pocket Monsters finally added to Pokémon GO!
Pokémon memes go viral as Japan pokes fun at Exeggutor’s new long-necked Alola form
Could the Pokémon GO model be the future of idol singer management video games?
Kyoto temple becomes Pokémon Go gym in Japan, provides special phone chargers for players
Pokémon GO player claims his in-game snapshot shows Japan’s new emperor and Pikachu together
Japan GO! Pokémon GO finally available in Japan!