If "millions of frogs" are being born in Goa every year, millions are dying. If all the "millions of frogs", lived and did not die, Goa would be overrun by "billions of frogs" by now which is not the case. Clearly the frog population is threatened and hence it is against the law to kill or consume frog in Goa.
http://www.savethefrogs.com/frogblog/?m=200905 Quote from the above blog: "Hunting,capturing and killing of any frog species is banned in the state of Goa under the Wildlife Protection Act of 1972. Similarly, serving frog meat in restaurants or private establishments is illegal and can result in a fine and/or imprisonment." george
