If you're looking for anime similar to Children of the Sea, you might like these titles.
According to legend, on a midsummer night the blue butterfly fish appears in a dragon's mouth near a tropical paradise. Ushio, Sara and their friends are in search of the fish, but even after multiple dives they're unable to find it. However, soon after Ushio and his friends encounter two women who seem to know about the blue butterfly fish. Will Ushio find what he's looking for?
Hanada Ichiro is an abrasive young man who lives with his hag of a mother, his father the drunk, his grandfather the absent-minded, and his older sister. One sunny afternoon, Ichiro's rebellious antics finally take a turn for the worse, causing him to get hit by a car. When he awakens, he discovers that he has the ability to see ghosts, and converse with them (much to his dismay, since they all seem to want helpful favors). Will Ichiro's newfound ability be a blessing, or just another annoyance in his life?
High atop a cliff sits the mansion known as Shadows House, home to a faceless clan that pretends to live like nobles. They express their emotions through living dolls that also endlessly clean the home of soot. One such servant, Emilico, aids her master Kate as they learn more about themselves and the mysteries of the house.
Follows Kimihiko Kimitsuka, a young man who four years ago became the assistant of a mysterious detective known as "Siesta" on a hijacked airplane. Together, Kimihiko and Siesta went on mind-boggling, globe-trotting adventures while combatting a secret organization, but all of that came to an end when they were separated by Siesta's death. In the present day, Kimihiko tries to return to an ordinary, boring life as a high school student, but things are never that simple, even though the detective is already dead.
Morimiya Yorito is a normal student who has an abnormal obsession for the sky. One day, he meets a strange girl named Shihou Matsuri who shares his interest, but as fate may have it, she isn't a human; Matsuri is a Yaka -- a "woe of the night" -- who is immortal and cannot stand the sunlight. A strange man is chasing Matsuri, to use her powers, so Yorito decides to help her hide. What are the strange man's plans, and what secrets does Yorito's sister hide?
One stormy night, a young woman is shot to death on a cliff; her body is found floating in the waters below the next morning. She was last seen with a man who is now being sought not only for her death, but also for the death of a yakuza at a local bar. Meanwhile, the man’s estranged wife has seen the police fliers and hires Goro, a private investigator, to find her husband first. Alongside another member of law enforcement with his own motives for finding the man, Goro sets forth on a trail of tragedy and intrigue to find the real reason behind these murders...
For centuries, a group of strange children with white hair have been appearing again and again, their origins and purposes unknown; yet always, it would seem, they are searching for something or someone. Now, in the year 2012, they have come to the South Seas to search. There, they encounter the young martial artist Tohma, who has been helping two runaway children from a nearby orphanage, Helga and Chitto. As Tohma learns more about the mysterious children, he also discovers a startling truth about his new friend Helga. A story unfolds that goes back centuries and across the stars, and will change everything in Tohma's and Helga's lives.