Silvergate Media and Night & Day Studios have officially launched the first mobile app based on the Octonauts TV series.

Available today for US$3.99, the iOS app is focused on 3D-animated exploration and features the main characters from the award-winning preschool series. It includes mini-games and missions, and also lets children interact with underwater creatures and learn about the undersea world.

Silvergate and Night & Day joined together back in June of 2015 to begin developing the app.

The mobile extension follows several other expansions for the show, which is in its fourth season. The first film for the franchise opened earlier this year, entitled Amazon Adventure – 4D, which follows the Octonauts on an adventure down the Amazon River. More 3D and 4D films are expected to debut shortly, after a three-year deal was made between SimEx and Silvergate.

Octonauts currently airs in 100 countries with broadcasters including CBeebies (the UK), ABC (Australia), Disney Channel (USA), TF1 (France) and CCTV (China).