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 de Santa Rosa 101 corridor: Laguna de Santa Rosa The Laguna de Santa Rosa is a wetland complex that drains a watershed encompassing most of the Santa Rosa Plain in Sonoma County, California, USA. The California Office of Environmental Health Hazard Assessment has issued a safe eating advisory for any fish caught in Laguna de Santa Rosa due to elevated levels of mercury and PCBs. In addition, there is a notice of "DO NOT EAT" for Black Bass. The Laguna, whose principal tributary streams rise on the southern slopes of the Sonoma and Mayacamas Mountains, is the largest tributary of Mark West Creek.