Zoo Tycoon: Marine Mania is an expansion pack for Zoo Tycoon, which included aquatic animals and themed buildings.
Players could create and manage underwater exhibits or merge aquatic tanks with traditional land habitats. Interactive tutorials and virtual marine specialists were available to help players maintain animal happiness. In addition, 10 new scenarios were added.
Also new in the expansion pack was the ability to create aquatic shows. This proves to be one of the main sources of income in the game and the acception of zoo tycoon animals
Source: Wikipedia, Zoo Tycoon: Marine Mania , available under the CC-BY-SA License.