An OVA, titled Aria the Avvenire, was released in the anime series' 10th anniversary Blu-ray box sets between December 2015 and June 2016.

The anime is licensed in North America by The Right Stuf International, which released all three seasons in box sets under its Nozomi Entertainment imprint between 30 September 2008 and 2 March 2010.

Aqua and Aria take place in the early 24th century, starting in 2301 AD, in the city of Neo-Venezia (ネオ・ヴェネツィア Neo Venetsia, literally "New Venice") on the planet Aqua (アクア Akua, formerly Mars, sometimes stylized as 火星 in the manga with the base text for "Mars" serving as a gloss), which was renamed after being terraformed into a habitable planet covered in oceans around 150 years beforehand.

[5] Neo-Venezia, based on Venice in both architecture and atmosphere,[6] is a harbor city of narrow canals instead of streets, traveled by unmotorized gondolas.

Aria continues her training as a Single, or journeyman, culminating in the graduation of Akari, Aika, and Alice as full Prima Undines.

[6] Amano frequently uses several pages of lush art to depict an environment, showing the wonder of both everyday activities as well as one-of-a-kind events.

[67] In another afterword, she stated that writing Aria has forced her to pay attention to the four seasons and that she hopes the series shows her appreciation for them.

In the universe of Aqua and Aria, Neo-Venezia's builders modeled it after the city of Venice before its demise in the 21st century,[71] including counterparts to such public landmarks as the Piazza San Marco and the Bridge of Sighs.

[74] As part of the preparations for the first season of the anime adaptation, the production crew led by director Jun'ichi Satō made a trip to Venice for location research.

As a result of filming the movements of gondoliers sculling, they had to redraw the animation of Undines rowing in the first episodes to make it realistic.

[75] Satō said that seeing a gondolier use his paddle to toss a bottle out of the water inspired the scene in episode 11 of Aria the Animation where Alicia does the same with a ball, which was not in the manga.

[76] As part of the production company's commitment to adapting the manga faithfully and gesture of consideration toward the voice actors, they provided the collected volumes of Aqua and Aria to date, rather than requiring them to purchase their own or giving stacks of photocopies.

Takeshi Senoo and the three members of Choro Club make a cameo appearance as musicians in episode 23 of Aria the Natural.

[85] Jun'ichi Satō has commented that the lyrics for the songs "Barracole" and "Coccolo", sung by Eri Kawai as the voice of Athena Glory, were gibberish.

Aqua was originally published by Enix in Monthly Stencil magazine from January to September 2001 and collected in two tankōbon volumes.

[107] The series was directed by Junichi Sato with character designs by Makoto Koga, and broadcast on the TV Tokyo Network between 2005 and 2008.

[116] On 12 August 2017, Right Stuf launched a Kickstarter campaign to produce an English dub and a Blu-ray release for the first season of the series, which ended on 11 September 2017 with a total of $595,676 raised, which is $230,000 over the final stretch goal of dubbing the entire franchise, including the 10th Anniversary special OVA series, Avvenire.

[120] The series is licensed in Korea by Animax Asia,[121][122] in Taiwan by Muse Communications,[123] in France by Kaze,[124] and in Italy by Yamato Video.

The radio show starred Erino Hazuki as Akari Mizunashi and Chinami Nishimura as President Aria Pokoteng, with other voice actors from the anime as guests reprising their respective roles.

Four art books were published by Mag Garden containing drawings and sketches for Aqua and Aria by Kozue Amano: Mag Garden published a fifth art book containing additional artwork used in the anime, video games, drama CDs, and merchandising: In addition, three poster books have been published, each containing ten A2-format posters: Four guide books to Aria have been released by Mag Garden: Additionally, Shinkigesha published guide books for each of Alchemist's two Aria video games, containing background materials, character profiles, and plot summaries covering all outcomes of the game: Aria has also been adapted as series of light novels published by Mag Garden, with two released as of January 2025: Monthly Undine is a spin-off facsimile of the Undine-focused magazine mentioned in the Aria universe.

When the three magazines' collectible items (toy house parts) are combined, they form a miniature "ARIA Company" building.

Each hardcover book contains a full-color short manga story focused on a cat president, and includes an additional collectible item written and illustrated by Amano Kozue.

"[6] Aqua and Aria together have been praised for their joyful calm,[214][215][216] vividly depicted futuristic world,[217] moments of magic,[216][218] and sense of whimsy.

[229][230] Anime News Network described the first season as "a gorgeous future fantasy populated with loveable characters", where "each episode is a finely fashioned tone poem steeped in a love of the slow rhythms of everyday life and told with an elegant self-possession that places it light-years beyond the vulgar moralizing of most "uplifting" stories.