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
Rancho Laguna (Alemany) of Laguna Lake. With Laguna Lake Park, the Laguna Lake Natural Reserve encloses the most of the shoreline of the lake and the lower reach of Prefumo Creek and its delta on the shore of the lake (following its diversion into the late 1950's), omitting only the northernmost area, called the Northwest Inlets. The reserve also encloses a strip of grasslands to the northeast of the lake to near the crest of the serpentine rock ridgeline. Rancho Laguna (Alemany) Rancho Laguna part of the grazing lands granted to Mission San Luis Obispo de Tolosa in 1844, surrounding Laguna Lake at