Sir David Attenborough unveils the two stunning underwater realms of Saudi Arabia - the flamboyant Red Sea and the contrasting hot muddy Gulf, capturing for the first time the rare event of Palolo worms spawning at night. 　　译文(3): 大卫·爱登堡爵士（Sir David Attenborough）展示了沙特阿拉伯两个令人惊叹的水下王国——艳丽的红海和对比鲜明的炎热泥泞的海湾，首次捕捉到了罕见的巴洛蠕虫夜间产卵事件。