GuessAnime.

1. Watashi wo Tabetai, Hitodenashi

“I’ve come to eat you.”

So softly utters the mermaid Shiori as she emerges from the sea and takes high school girl Hinako by the hand. Hinako lives alone in a town by the sea and possesses an unusually delicious body that is irresistible to nearby monsters. To ensure that she matures to the best condition, Shiori seeks to protect Hinako—all so that someday, she can devour every piece of her. What will become of Hinako’s feelings as this looming unjust death closes in on her…?

A Monster Wants to Eat Me is unreleased . It is also Known as: 私を喰べたい、ひとでなし, Watashi wo Tabetai, Hitodenashi

2. ChaO

In a futuristic world where humans and mermaids coexist, ChaO follows Stephan, a mild-mannered office worker at a shipbuilding company, whose life is upended when he is suddenly proposed to by Chao — a princess from the mermaid kingdom. With no time to make sense of what’s happening, Stephan soon finds himself living with the unpredictable, wholehearted Chao. As her sincere love begins to break down his emotional barriers, an unexpected and touching romance begins to unfold.

ChaO is a Movie. It is also Known as: チャオ, ChaO

3. Seto no Hanayome

Michishio Nagasumi's life couldn't be any more normal. In an odd twist of events, during his summer vacation he ends up almost drowning in the sea. Luckily, the cute mermaid Seto Sun appears to save him. However, Sun is from a yakuza mermaid family and according to their law, if a human is to catch sight of a mermaid, either he or the mermaid must die. The only other way is for Nagasumi to be taken in as a family member, marrying Sun. In attempts to save both of their lives, Nagasumi asks for Sun's hand in marriage. Nagasumi's summer vacation reaped more than what he would expect, as he must now protect Sun from others finding her secret out.

My Bride is a Mermaid is finished and has 26 Episodes. It is also Known as: 瀬戸の花嫁, The Inland Sea Bride

4. Sayonara Lara

All because of "love"

Announced and revealed at Anime Central 2024's "Kinema Citrus Sweet 16: My Happy Marriage and What's New" panel, this anime follows a mermaid who makes a forbidden wish to be loved by a human. Following her death, she is reborn 200 years later into modern-day Japan in Lake Biwa, where she learns to adjust in a human world.

Goodbye, Lara is unreleased . It is also Known as: さよなら ララ, さよララ, SayoLara

5. Mermaid Melody Pichi Pichi Pitch

As the mermaid princess of the North Pacific , Lucia entrusts a magical pearl to a boy who falls overboard a ship one night. Lucia must travel to the human world to reclaim her pearl and protect the mermaid kingdoms. Using the power of music Lucia is able to protect herself and the mermaid kingdoms from a growing evil force.

Mermaid Melody: Pichi Pichi Pitch is finished and has 52 Episodes. It is also Known as: マーメイドメロディー ぴちぴちピッチ, Mermaid Melody Pichi Pichi Pitch

6. Akazukin Chacha

Akazukin Chacha is the story of a young magical girl named Chacha. Living with her guardian in a cottage on Mochi-mochi mountain is Seravi, who is her teacher and also the fictional world's greatest magician. Chacha is clumsy in casting her spells because, throughout the anime, when she summons something, it often turns out to be something that she didn't mean to cast, for example, spiders instead of a cloud . At times in the anime when she and her friends are in trouble, however, her spells do work. Living on the same mountain is a boy gifted with enormous strength named Riiya. It is described that Riiya came from a family of werewolves who can instantly change into a wolf whenever they want. Quite far from Mochi-mochi mountain lies Urizuri mountain. Dorothy, also a well known magician in her land, lives in a castle on Urizuri mountain. Living with her is Shiine, her student. Shiine is adept when it comes to casting spells. He is a young wizard and most of his knowledge about magic was taught to him by Dorothy.

The first 2 seasons were originally created by the anime team. Most of the stories in season 3 are based on the manga.

Red Riding Hood Chacha is finished and has 74 Episodes. It is also Known as: 赤ずきんチャチャ, Akazukin Chacha

7. Orenchi no Furo Jijou

On his way home from school, Tatsumi sees a man collapsed near a lake. When he approaches him, Tatsumi notices something strange: the person in need of help is actually a beautiful merman named Wakasa! Because Wakasa's home has become too polluted to live in, Tatsumi graciously offers his bathtub as a refuge.

With a boisterous merman as his new roommate, Tatsumi's normal life won't be returning anytime soon, not to mention Wakasa's aquatic friends—Takasu, Mikuni, and Maki—often show up uninvited, making them all quite a handful for the high school student. As he humors their curiosity for human life, Tatsumi sometimes finds himself enjoying their childish antics, but he will have to keep his cool if he intends to keep up with his daily life and newfound friendship.

Orenchi no Furo Jijou is finished and has 13 Episodes. It is also Known as: オレん家のフロ事情, Orefuro, Merman in my Tub

8. Mermaid Melody Pichi Pichi Pitch Pure

After the final battle against Gaito, Sara had given her life to remain with him. The sea world is now at peace, but only with six mermaid princesses.

While Caren, Noel, and Coco have returned to their kingdoms, it should be time for Lucia, Hanon, and Rina to do the same. After all, Mitsuki Tarou is leaving for Germany, and Doumoto Kaito is heading to Hawaii. Lucia is devestated, and when things couldn't get any worse, Kaito is lost at sea! Worst of all, a strange angel named Michel has appeared, wanting the mermaids to join him. But on the lighter side, Sara's spirit tells Lucia of Sara's successor, a young mermaid named Seira. The mermaids are in for another adventure!

Mermaid Melody Pichi Pichi Pitch Pure is finished and has 39 Episodes. It is also Known as: マーメイドメロディーぴちぴちピッチピュア, Mermaid Melody Pichi Pichi Pitch Pure

9. Namiuchigiwa no Muromi-san

Mukoujima Takurou is a lonely teenager who spends his time fishing at the pier and, to his incredible surprise, fishes up Muromi, a mermaid. Muromi first off doesn't realize she's a mermaid until she meets Takurou. Not only that, she is incredibly dense and crazy and has a drinking problem to top it off. Now every time Takurou goes fishing, Muromi appears and makes life interesting for him.

Muromi-san is finished and has 13 Episodes. It is also Known as: 波打際のむろみさん, Namiuchigiwa no Muromi-san

10. Andersen Douwa: Ningyohime

Marina, the most beautiful mermaid in the royal Merman family, is curious about the human world. One day, she sees a handsome prince on a boat. Suddenly, a storm comes up, throwing him into the sea. Marina saves her handsome prince and guides him to the shore. Marina falls deeply in love and desperately wants to become a human. Despite the hazards, she is willing to risk it all for love.

Andersen Douwa: Ningyohime is a Movie. It is also Known as: アンデルセン童話 にんぎょ姫, The Little Mermaid

11. Kono Danshi, Ningyo Hiroimashita.

*The Second OVA of Kono Dan series.

They say look before you leap and make sure you can swim before you go in the deep water, but when a picture of his late grandfather falls into the ocean, Shima jumps in after it without thinking. Nearly drowning as a result, he is instead saved by a very perfect stranger... one whose strangeness extends to only being human from the waist up!

For Shima, who's always felt like a fish out of water himself, it's more than just a revelation, and the young man and merman quickly begin to bond in ways neither anticipated. And yet, it's going to be far from easy sailing. After all, Shima and Isaki aren't just from opposite sides of the tracks, they're from entirely divergent species, and swimming in separate gene pools may make maintaining a long term relationship a whole different kettle of fish!

This Boy Caught A Merman is finished and has 1 Episodes. It is also Known as: この男子、人魚ひろいました。, This Boy Picked Up A Merman

12. Seto no Hanayome OVA

The Seto no Hanayome OVAs are new stand alone shorts with characters from the series and also two new ones. It is now the third year of school, San and Luna's dads are still being over protective. All the while Nagasumi has his hands full trying to keep everyone around him under control and rescuing damsels in distress.

My Bride is a Mermaid OVA is finished and has 2 Episodes. It is also Known as: 瀬戸の花嫁 OVA, Seto no Hanayome Jin, Seto no Hanayome Gi

13. Mermaid Forest OVA

This anime is based on the Mermaid Forest story line found in the graphic novel by the same name. Mana and Yuta are drawn into the world of the Kannagi Family, owners of Mermaid Forest. Only two of the Kannagi clan remain - an old women and a young girl with hair as white as snow. What is the secret of these two women? And what is the secret of Mermaid Forest? Is there really a mermaid buried somewhere in the hills......a mermaid that could help Yuta return to normal?

Mermaid Forest OVA is finished and has 1 Episodes. It is also Known as: 人魚の森, Ningyo no Mori, Rumic World 4

14. Doraemon Movie 30: Nobita no Ningyo Daikaisen

Nobita asks Doraemon to take him somewhere they can dive and as a result the robot-cat uses several gadgets to make it possible for both to able to swim on an imaginary ocean above sea level. Inadvertently a mermaid ends up on Nobita's backyard when they turn off the illusion. Her name is Sophia and she is a princess of an ancient underwater civilization. Doraemon, Nobita, Shizuka, Jyaian, and Suneo quickly become her friends and are invited to visit her homeland. While heading towards the underwater kingdom they find themselves amid a conflict between the mermaids and an opposing tribe that has driven them away from their home planet thousands of years ago. Doraemon, Nobita, and their friends must then aid Sophia find a legendary sword that might bring peace once again to the seas.

Doraemon Movie 30: Nobita no Ningyo Daikaisen is a Movie. It is also Known as: 映画 ドラえもん のび太の人魚大海戦, Doraemon: Nobita's Great Mermaid Naval Battle

15. Doria & Hai Nuo - Mermaid Song

Similar anime like Doria & Hai Nuo - Mermaid Song

Doria & Hai Nuo - Mermaid Song is finished and has 1 Episodes.

16. Ningyohime Marina no Bouken

Marina is a little mermaid who lives under the sea. One day she rescues a prince named Justin. She fell in love with him but because she and Justin are from two different worlds they can't be together. Marina and her seahorse friend Winnie pay the evil sea witch a visit hoping that she can help solve her problem. Marina can now finally walk on her own two legs, but Justin himself has lost his memory and now believes it was Cecily, a human princess, who saved him.

Saban's Adventures of the Little Mermaid is finished and has 26 Episodes. It is also Known as: 人魚姫 マリーナの冒険, Ningyo-hime Marina no Bouken, Mermaid Princess: Marina's Adventure

17. Mermaid Forest

According to an ancient legend, mermaid's flesh can grant immortality if eaten. 500 years ago, Yuta unknowingly ate a piece of mermaid's flesh. For centuries, he travels across Japan, hoping to find a mermaid, thinking she may be able to make him a normal human again. When he finally finds one, he discovers that she and her companions have been raising a girl to be their food so they can eat her and take on her youthful looks. That is how mermaids stay young. Yuta kills the mermaids and rescues her, but she has already eaten some of the mermaid's flesh. Although he had to kill the mermaids, Yuta isn't too disappointed. Yuta's once lonely existence is now over, as he has found a companion in Mana. And Mana, who had been trapped in a small hut her whole life, finds delight in even the simplest of things. Together, Yuta and Mana attempt to seek out more mermaids, trying to become normal humans again.

Mermaid Forest is finished and has 13 Episodes. It is also Known as: 高橋留美子劇場 人魚の森, Takahashi Rumiko Gekijou Ningyo no Mori TV