毫无疑问,雄海马从来不会和它们的孩子玩接球游戏或者帮助孩子做家庭作业。但它们有一点确实胜过人类的爸爸:雄海马承担了怀孕直至让儿女出生这项任务。这些奇怪而非常有趣的鱼类具有这个独一无二的特点,它们生活在全世界热带和温带的海域中。海马的体长小到不足一英寸,大到一英尺,它们已进化出一系列不同寻常的适应性特征。它们是外貌如此奇特的鱼类, There is no doubt that male seahorses never play catch games with their children or help children with homework. But one thing they did better than human father: Hippocampus assumed the task of getting pregnant until the children were born. These strange and very interesting fishes have this unique feature. They live in tropical and temperate seas around the world. The hippocampus, which is less than an inch long and as big as a foot, has evolved a series of unusual adaptive features. They are such exotic fish that they are