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大海每天都有漲潮和退潮的現象,当潮水上漲的时候,成片的海滩或原来沒有水的海边灣汊地方,就被海水淹沒。这时候,有許多魚、虾、蟹随潮水到来。当潮水退落的时候,这些魚、虾、蟹有的随水退去,有的留在海滩上被捕捉,也有的在某些低洼积水之处继續生活下去。相傳在几百年以前,我国沿海的漁民根据这种現象,有意識地把魚虾苗引进海边的灣汊或海滩
Every day, the sea has high tides and low tides. When the tide rises, a piece of beach or a place where there is no water in the seaside bay is flooded with seawater. At this time, there are many fish, shrimps and crabs that come with the tide. When the tide receded, some of the fish, shrimps, and crabs retreated with the water, and some stayed on the beach to be caught, while others continued to live in some low-lying areas. According to legend, hundreds of years ago, according to this phenomenon, fishermen on the coast of China have consciously introduced fish and shrimp seedlings into the bay or beach of the sea.