Roku is removing its popular Aquatic Life fish tank screensaver on December 1 and automatically switching affected users to Roku City. According to Cord Cutters News , the creator pulled the license after Roku's sale to FOX was announced . Ars Technica reports: The screensaver has been an option for Roku OS users for 10 years. Roku has been licensing the animation, which is called the Marine Aquarium , from artist Jim Sachs through Prolific Publishing . Sachs is the creator and copyright holder of the Marine Aquarium. He developed the screensaver through his company SereneScreen . He tells Ars Technica that the licensing agreement with Roku is up for renewal every October and can be canceled by either party for any reason. A day after learning that Fox was planning to buy Roku, a deal that closed today , Sachs told Prolific that he wouldn't be renewing Roku's license.…