Kantai Collection (Japanese: 艦隊これくしょん, Hepburn: Kantai Korekushon; translated as "Fleet Collection", subtitled as "Fleet Girls Collection"), known as KanColle (艦これ, KanKore) for short, is a 2015 Japanese anime television series produced by Diomedéa, based on the game of the same name by Kadokawa Games. The series was announced in September 2013, and aired from January to March 2015. An animated film, titled KanColle: The Movie (劇場版 艦これ, Gekijō-ban KanKore), was released on November 26, 2016.

A second installment titled KanColle: Someday in that Sea (「艦これ」いつかあの海で, KanKore: Itsuka Ano Umi de; Official: Fleet Girls Collection "KanColle" 1944 -I・TSU・KA・A・NO・U・MI・DE-) by ENGI aired from November 2022 to March 2023. The stories of the first and second animes are not connected and are separate works, not being set in the same universe and timeline.

In a world where humanity faces the threat of the abyssal fleet which has taken over the seas, special human girls who don weaponized outfits and possess the spirit of historical naval vessels known as kanmusu (艦娘; literally "fleet girls" or "ship girls") are the only ones capable of countering them. The kanmusu live together at a naval base, where they spend their everyday lives as they begin training for battle.

The series features the destroyer Fubuki as the main character, with the storyline based on her point of view. Fubuki arrives at the naval base, where she meets other girls that she will eventually fight alongside. Despite lacking adequate combat training, she is recommended into the Third Torpedo Squadron by the admiral, and quickly finds herself sortied into battle. Upon being rescued by Akagi in a dangerous situation, Fubuki strives to do her best in order to train, with the hopes of eventually being able to fight alongside Akagi.

The film follows the development of the 1st anime, keeping the main cast with some new additions. Kisaragi plays here a more prominent role, and the movie also introduces another element from the game, a "Dark Portal".

In the second anime, the series shifted its spotlight to Shiratsuyu-class destroyer Shigure, with the storyline being loosely based on the final two years of the Pacific War. As the Abyssal Fleet encroaches on Leyte Gulf, Shigure, along with a few other kanmusu, are assigned to the First Striking Force, Third Section, which serves as a diversionary fleet. Even if the mission is going to be suicidal, Shigure refuses to let the enemy take another comrade from her.

Here is the list of all ships featured in the second anime. Ship girls have personalities identical to the game and the first anime, with more development around the main cast. In addition, the Admiral is no longer an ambiguous figure, being clearly defined as a character, being voiced by Ken Narita.

The series is directed by Keizō Kusakawa, with the script written by Jukki Hanada, and features the voice cast from the original game. The show's premiere screening event took place at Shinjuku Piccadilly on December 27, 2014. The 12-episode series aired in Japan between January 8 and March 26, 2015 and was simulcast by Crunchyroll. The first Blu-ray and DVD compilation volumes were released on March 27, 2015. Funimation released the series in North America, on behalf of Crunchyroll. Madman Entertainment licensed the series in Australia and New Zealand. The opening theme song is "Miiro" (海色; "Ocean Color") performed by Akino from bless4, and the ending theme is "Fubuki" (吹雪; "Blizzard") by Shiena Nishizawa.