B.B. Fish - Recommendations

Alt title: Blue Butterfly Fish

If you're looking for manga similar to B.B. Fish, you might like these titles.

Children of the Sea

Children of the Sea

When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora. They were raised by dugongs and hear the same strange calls from the sea as she does. Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish.

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Glaucos

Glaucos

Free diving is an extreme sport, and each meter added to its record brings us closer to the sea bed and further from the surface where one can breathe again. In this sense, free diving has a direct connection with death, with which our fight continues, refashioned over time, bit by bit. So, why would one free dive, and risk his life? The answer lies within the mysterious bond between the sea and human kind. And in the fast evolving world of competitive diving, new data emerges that casts light on this bond.

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Crossline (Ark Performance)

Crossline (Ark Performance)

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Ryugu Town is at the Bottom of the Sea

Ryugu Town is at the Bottom of the Sea

Ryugu is a small town under the sea. Aside from the fact that everything is, well, underwater, it's just like every other small town. Classmates Masora and Sumire are like every other middle school girls, swapping love stories and hanging out in shopping malls. But for some reason, Sumire feels like this "ordinary life" is all going to come crashing down...

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Standard Blue

Standard Blue

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...

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Nagisa Marine Life

Nagisa Marine Life

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Shinkai Rendezvous

Shinkai Rendezvous

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Sea Glass

Sea Glass

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DEEP (Yasuo OOTAGAKI)

DEEP (Yasuo OOTAGAKI)

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...?

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Witches

Witches

In a world that is now dominated by religion, few exist who still believe in the old ways of magic and even rarer are those who still practice the ancient arts. Though branded by the majority as heretics, witches still exist across the world and come in many guises. From vengeful sorceresses and a shaman calling upon the spirits to protect her homeland from invading soldiers, to provincial witches in tune with the very world around them, these magic users remain relentlessly shunned by the institutions around them. But while religious heads and pompous rulers see their very existence as a stain on humanity, these witches have more to teach the world than we could possibly know...

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