From Fish Hooks Wiki
Poptropica is an online role-playing game owned by Pearson PLC, the global publishing and education company. It was made by Jeff Kinney, the author of the Diary of a Wimpy Kid book series. The site is aimed at children ages 6 to 15 and players can go to different islands, compete in multi-player games, and communicate with each other. Poptropica was officially launched September 2007, and has grown to have over 500 million registered users.
Leading up to the premiere of "Bea Stays in the Picture", Poptropica launched an 'advertisement game' in which a player goes into the fish tanks in search of Bea's picture so they can replace it with a different one. In reward for completing the game, the player receives an "Official Fish Hooks T-shirt" and an Underwater Effect for them to use. It was probably, like most other 'advertisement games' launched on Poptropica, only available for a 2-week period.
During gameplay; in this image the player is running through Freshwater High.