又大又肥的黄蛤蟹(貌如青蟹)白天总是蜷缩着深藏在泥洞里，一般到夜深人静时才悄悄地爬出来觅食，沙滩或泥地里便留下了它爬行的足迹。
O O O O O B-Thing I-Thing I-Thing O O O B-Thing I-Thing O B-Time I-Time O O O O O O O O B-Location I-Location I-Location O O O O B-Time I-Time I-Time I-Time I-Time O O O O O O O O B-Thing O B-Location I-Location O B-Location I-Location O O O O O B-Thing O O O O O O