Kagi wo Hitsu Kushita Yamabiko - Recommendations

• Vol: 1; Ch: 2
• 2002

Retired deep-sea diver Albert goes on one final job to recover a unique, once in a lifetime treasure, which is said to be inside the safe of a U-Boat, 620 meters under sea. Together with his old team, the treasure hunters known as DEEP, the mission to recover the safe begins...?

• Vol: 1
• 2006

When his ship is attacked by pirates, Archer is left floating adrift in a violent sea. But the young urchin is nothing if not resilient. He soon finds himself sailing with the infamous Cannonball Joe aboard "La Revancha," the fastest ship on the East Coast, in search of a legendary cache of hidden treasures. Their dangerous quest will lead directly to a showdown with the "Hoboken," one of the most feared pirate vessels ever to sail the Jersey shores, and its reckless captain, Lee. But there are far worse things than pirates that call these waters home...

• Vol: 5; Ch: 43
• 2007 - 2008

At the end of the 21st century, the earth is covered with Human/fish hybrids. Water almost completely surrounds earth and so these hybrids known as "Fish-halfs" roam the waters. A girl named Guppy is rescued by a hybrid named Shark, who wants nothing more than killing off the navy (who try to control him).

• Vol: 1; Ch: 8
• 1998

The year is 2024. With the world's population continuously rising, man has looked to the sea for increased food supply and energy resources. Nirai Island - also known as Standard Blue - is the largest artificial island in the world. Near its waters the Ushio Sea Service operates, finding anything from lost pets to salvage quickly and accurately - for a price. Its crew is led by the elderly Taizou and a band of seafaring misfits, plus one new addition: Shiki, Taizou's granddaughter. She has run away from home to help cope with a personal tragedy four years ago, and slowly but surely gets in touch with the sea. Alongside the crew of the Ushio Sea Service, Shiki helps rescue dolphins and save stranded people in distress, but she soon will face her most difficult and dangerous challenge yet...

• Vol: 4; Ch: 33
• 1967 - 1971

The ocean holds many tales. Tales of mermaids, of underwater kingdoms, and of fantastical beasts lurking in the deep. Spurred by these tales, Kazuya sets out to find the truth, but what he finds is a baby?! Not just any baby, the baby Kazuya finds is Triton! The last of a once mighty and proud race of people from the sea. Triton seems human, but unusual and terrible events begin to happen with all those around him. Who is Triton, and why does he bring misfortune to everyone around him? From the imaginative mind of Osamu Tezuka, creator of the beloved AstroBoy series, comes his original and thrilling take on the legend of Atlantis: Triton of the Sea!

• Vol: 1; Ch: 6
• 2009

Based on the novel Moby Dick by Herman Melville.

• Vol: 2; Ch: 25
• 2013 - 2015

• Vol: 2+; Ch: 16+
• 2017 - ?

Sixteen years after the great hydroseism, nearly the entire world has sunken beneath the seas... but that won't stop Tatsumiya Minato from following her dream of becoming a high school student at the Enoshima Women's Ocean Academy!

• Vol: 1; Ch: 8
• 2002 - 2003

Link used to live a carefree life on a tropical island with his grandmother and sister. However, when his sister is kidnapped by a large bird, Link joins the crew of a pirate ship and sails forth on a grand adventure. Along the way, he learns how to salvage items from the ocean, meets a talking dragon ship, gets his first sword and becomes acquainted with odd new friends such as Tingle, amongst other things. What else will Link discover on his quest?

• Vol: 2; Ch: 17
• 2000 - 2002

Nagisa has just recently transformed from being a human to a mermaid and is easing into the transition of living in the ocean. But when she crashes into a research submarine, she loses her memory and is brought on board the Sogei. It turns out that her love interest from when she was still human, Osanai, is on board and he tries to keep his past with Nagisa a secret from everyone else. Her mermaid friend, Tsunami, goes on a rescue mission to find Nagisa and warn her that since she just transformed into a mermaid, if she doesn’t speak for an hour, she turns back into a human and her life expectancy will dramatically drop!