You find me a rain drop with a fish in it and I'll agree with you a rain drop is the ocean. 
Known occurrences:
* Cambridge, Maryland, 1828
* Rahway, New Jersey, November 13, 1833
* Aberdare, Glamorganshire, Wales, 1841
* Singapore, February 22, 1861 [10]
* Mountain Ash, Glamorganshire, Wales, February 9, 1859
* Olneyville, Rhode Island, May 15, 1900
* Tiller’s Ferry, South Carolina, June 1901 (catfish)
* Marksville, Louisiana, October 23, 1947
* Ranchi, India, July 1997
* Great Yarmouth, Norfolk, August 8, 2000
* Wiltshire, May 2001
* Knighton, Powys, Wales, August 18, 2004
* Murfreesboro, Tennessee, 2004
* Paravur, Kerala, India May 2006
* Peerumed, Kerala, India July 2006
* Thaliparamba, Kerala, India, July 20 2006
* Paracatu, Minas Gerais, Brazil, February 14, 2007
* Honduras, Rain of Fishes, (supposedly taking place once or twice a year, every year for more than a century)