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海马为什么是公的生子
更新时间: 2020-08-15 00:00:00  

雄海马并不能生子,而是负责育儿,雄海马的育儿袋只是起到了孵化器的作用,卵是来源于雌海马。雌海马把卵产到雄海马的育儿袋中,精卵结合形成的受精卵在育儿袋内发育。受精卵在育儿袋内经过20—30天发育,形成成熟的“胎儿”。雄海马会把尾巴紧紧攀在海藻上,然后不断收缩肌肉,育儿袋口张开,小海马便会降生。

关键词: 海马 为什么 生子

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