Nowadays people are very fond of diving within the water and swim. This has become a fashion. So next life they are going to become fish. Yes. If you at the time of death, if you think of that, how to swim very nicely within the water, that means next life nature will give you a fish life. You get it. That is God’s mercy. Why you artificially try to become a fish? You become actually fish. That is nature’s gift.

From Srila Prabhupada’s lecture on Bhagavad-gita 9.4 — Melbourne, April 22, 1976