亲爱的刘子轩小朋友:你好!鲸是哺乳动物,是已知海洋中最大的动物。鲸的身体很大,最大的体长可达30多米,最小10米长。统计数据显示,已知最大的鲸约有16万公斤重,最小的也有2000公斤。我国发现了一头40多吨重的抹香鲸,约有17米长。鲸之所以会长得这么大,是由遗传基因决定的。每个物种都在各自的生存环境中适应了千百万年,进化出了与之相适应 Dear Liu Zixuan: Hello! The whale is a mammal and is the largest known animal in the oceans. The body of a whale is large with a maximum body length of up to 30 meters and a minimum length of 10 meters. Statistics show that the largest known whales are about 160,000 kilos and the youngest is 2,000 kilos. A 40-tonne heavy sperm whale was found in our country about 17 meters long. The reason why whales grow so much is determined by the genetics. Each species adapted to millions of years in its own environment and evolved to suit its needs