In some pools, aptly known as the hippo pools, groups of these barrel - shaped giants stay submerged all day long, coming out to graze during the night.
وقد صُمِّمت حول مصادر الماء هذه ممرات طبيعية حيث يمكن للمرء ان ينزل من سيارته ويتمشّى .‏