每日雅思词汇：鲸鱼鲨鱼　　鲸鱼whale; 　　蓝鲸blue whale; 　　白鲸white whale/beluga whale; 　　座头鲸humpback whale; 　　长须鲸fin whale; 　　抹香鲸sperm whale; 　　遥人鲸killer whale; 　　鲨鱼shark; 　　大白鲨great white shark; 　　双髻/锤头鲨hammerhead shark; 　　锯鲨saw shark; 　　巨口鲨megamouth shark; 　　虎鲨tiger shark