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 Bay aside from "lago". Some examples of the worldwide usage of "laguna" for lakes include Laguna Chicabal in Guatemala, Laguna de Gallocanta in Spain, Laguna Catemaco in Mexico and Laguna de Leche, the largest lake in Cuba. The lake's alternate name, "Laguna Lake", refers to the Province of Laguna, the province at the southern shore of the lake. Laguna province, though, was named because of the large lake and was originally called "La Laguna" till the early 20th century. In the pre-Hispanic era, the lake was known as "Puliran Kasumuran" ("Laguna Copperplate Inscription", 900 AD), and later by "Pulilan" ("Vocabulario de