Gargantia on the Verdurous Planet is a tV series anime that premiered in spring 2013, produced by Production I.G.

About the production: the story comes from an original script, there are 13 episodes of about 23 minutes and its current status is "finished".

Its main genres are action, adventure, mecha and sci-fi, with themes such as Environmental, Lost Civilization, Artificial Intelligence and Post-Apocalyptic.

On AniList, Gargantia on the Verdurous Planet has an average score of 72%, a good score, and appears on 76,121 users' lists.

The franchise continues in or follows from: Suisei no Gargantia OVA.

The story begins in the distant future in the far reaches of the galaxy. The Human Galactic Alliance has been constantly fighting for its survival against a grotesque race of beings called "Hidiaazu." During an intense battle, the young lieutenant Ledo and his humanoid mobile weapon Chamber are swallowed up into a distortion of time and space. Waking from his artificially induced hibernation, Ledo realizes that he has arrived on Earth, the planet on the lost frontier. On this planet that was completely flooded by the seas, people live in fleets of giant ships, salvaging relics from the seas' depths in order to survive. Ledo arrives on one of the fleets called Gargantia. With no knowledge of the planet's history or culture, he is forced to live alongside Amy, a 15-year-old girl who serves as a messenger aboard the Gargantia fleet. To Ledo, who has lived a life where he knows nothing but fighting, these days of peace continue to surprise him. (Source: Anime News Network)

Official synopsis from AniList.