Laguna (province) producing of fish. Carp and tilapia fingerlings are also being grown in inland ponds and freshwater fish pens. There are a total of 457 operators utilizing an area of for fish pens and fish cages. Aside from the Laguna de Bay, approximately 12% of the area in the Seven Lakes of San Pablo is being used for aquaculture. Laguna is home to twenty-one economic zones as registered under the Philippine Economic Zone Authority. Most of these economic zones are located in Santa Rosa, Biñan, and Calamba. The largest economic zone in Laguna is the Laguna Technopark, located in Santa Rosa
Laguna Lakeshore Expressway Dike the expressway dike from causing larger-scale flooding on the eastern shore of the lake is the construction of a 20 Kilometer "Pacific spillway." This would take the form of either a tunnel or an open canal which would begin at the eastern shore of Laguna de Bay, cross the Sierra Mountains, and release water into the Pacific Ocean somewhere along the shore of Infanta. In an August 23 interview with GMA News TV's News to Go, Laguna Lake Development Authority General Manager Nereus Acosta said that the government would be pursuing this project in place of the 1970s Parañaque spillway