What is "electroplankton"

is an interactive music video game developed by indieszero and published by Nintendo for the Nintendo DS handheld video game console. It was first released in Japan in 2005, and was later released in North America and Europe in 2006. This game allows the player to interact with animated plankton and create music through one of ten different plankton themed interfaces. The first-run edition of Electroplankton in Japan came bundled with a set of blue colored ear bud headphones.