Rainbow Fish is a children's animated television series adapted from the book of the same name by Marcus Pfister. However, the television series does not follow the plot of the book; instead, it takes the character and the setting to create new stories. For the show's purposes, some characters were added and others were expanded. In the series, the fish live in a place called Neptune Bay (named after Neptune, the god of the sea), and attend "The School of Fish". The series also features a location called "Shipwreck Park", resembling the wreck of the RMS Titanic.
The series was produced by Decode Entertainment and EM.TV & Merchandising AG for Sony Wonder. It originally aired for a single season of 52 episodes, from January 8 to December 24, 2000.
Before the series was announced in 1997, Sony Wonder, the kids & family entertainment label of Sony Music Entertainment (later Sony Pictures Home Entertainment), originally acquired the rights to Marcus Pfister's book The Rainbow Fish into a direct-to-video adaptation. But one year later in 1998, Sony Wonder announced it would adapt the book into a television series with Sony Wonder producing the upcoming series & handle international distribution and partnerning German entertainment company EM.TV & Merchandising to handle co-production for the upcoming series & handle European distribution.
In May 1999 when Sony Wonder had brought New York-based American animation studio Sunbow Entertainment one year prior in 1998 during the development of the adpatation of The Rainbow Fish, Sunbow Entertainment took over international distribution of the upcoming adaptation of The Rainbow Fish from its parent Sony Wonder while it retained North American distribution to the series. Later in that year, Canadian television studio Decode Entertainment joined the upcoming co-production series with them appointed Toronto-based Funbag Animation Studio to handle animation services for the series while HBO Family commissioned the series for the network.
Distribution to the series had taken to different owners when the series ended, Sony Wonder (now Sony Pictures Kids Zone) had sold its television arm including distribution rights to the series (excluding Europe) to German management & entertainment company TV-Loonland in October 2000, however Sony retained the North American home video and international audio rights to Rainbow Fish; Munich-based kids & family entertainment alum Made 4 Entertainment (m4e) would take over distribution to Rainbow Fish when they brought TV-Loonland's catalouge.
m4e's Belgian production studio & competitor Studio 100 under its distribution arm Studio 100 International currently hold distribution to the series for Europe when they had brought EM.Entertainment GmbH, the German kids & family entertainment arm of EM.Sport Media AG in May 2008, Studio 100 would soon take over worldwide distribution to the series when its distirbution arm Studio 100 International (known as Studio 100 Media) had brought a majority stake in m4e ten years later in February 2017, that reunited the library of co-producer EM.Entertainment with the catalouge of Sony Wonder's television division.
Internationally, the series aired on Rai 3 in Italy, on La 2 and Cartoon Network (Small World) in Spain, on ARD in Germany, on MTV3 in Finland, on HBO Family in the United States, on Tiny Pop in the United Kingdom, and on Disney Channel (Playhouse Disney) in Australia.