青灰海蛇（學名：Hydrophis caerulescens）為眼鏡蛇科海蛇屬的爬行動物。分佈於從印度洋經南中國海至印度尼西亞到澳大利亞，台灣以及中國大陸山東沿海等地。該物種的模式產地在印度洋Vizagapatam。
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