在这本实用的袖珍指南中了解你想知道的关于海洋哺乳动物的一切知识。这本由自然历史专家撰写的书籍对所有的海洋哺乳动物家族做了全面的介绍。包含有关鲸鱼、海豚、鼠海豚、独角鲸等等动物的信息！读一读，然后把这本书带到野外。这个值得收藏的系列还包括：爬行动物袖珍指南。

Learn everything you ever wanted to know about marine mammals, in this handy pocket-sized guide. Written by a natural history expert, this book provides a comprehensive introduction to all the families of marine mammals. Contains information on whales, dolphins, porpoises, narwhals and much more! Get reading and then take your book out into the wild. Also in this collectable series: Pocket Guide to Reptiles.