Octodad: Dadliest Catch Original Soundtrack
http://store.steampowered.com/app/296170/

Written and Produced by Seth Parker.
Artwork by Chris Stallman.

You can find more music from Kozilek here.
Ian McKinney's Bandcamp is here.
and more of Whitaker Trebella's tunes are here.

If you purchased the soundtrack DLC the files will be placed in your Octodad Dadliest Catch folder in the Steam Directory: …\Steam\SteamApps\common\Octodad Dadliest Catch\Octodad Dadliest Catch Original Soundtrack\ (Right click Octodad Dadliest Catch in the Games list -> Local Files -> Browse Local Files).