開心水族箱 developer Happy Elements announced a second round of funding today totaling $30 million. The Beijing-based social game developer plans to put the funds toward expanding more aggressively in the mobile market.

Happy Elements has a number of games out on various platforms and devices across the globe, including social networks Facebook, Tencent, Renren, Kaixin, Mixi, Hangames, Cyworld, Daum, Netlog, Hyves, StudiVZ and Orkut. Its largest game on Facebook to date is 開心水族箱 (My Fishbowl), an aquarium simulation available in several major languages. At one point its Chinese language version of the Boss Vegas casino-builder game was a close second, but that title has sharply declined in overall traffic since July.

According to the press release announcing the funding round, Happy Elements has only three mobile games currently available in Japan. The latest of these appears to be iOS title Happy Fish Dream Aquarium, released this month. The developer says that with this round of funding, it will push mobile development further with the release of new games for various mobile devices in 2012.

The round was led by Legend Capital with participation from existing investor DCM. This brings Happy Elements’ total funding to $35 million.