Raised from an egg by Mother Duck, Guji Guji is quite content with his life as a duckling, despite the fact that he doesn't look anything like his brothers. Then one fateful day he meets up with three nasty, grinning creatures who not only convince him that he is, like them, a crocodile, but also try to persuade him to deliver his fat, delicious duck relatives for their dinner.
「Guji Guji」是一只鳄鱼的名字，它阴错阳差生长在鸭子家庭里，鸭妈妈对它和小鸭子一视同仁，都一样的疼爱和照顾。有一天，来了三只不怀好意的鳄鱼，先是把Guji Guji嘲弄了一翻，然后又怂恿它诱捕那些鸭子，想吃一顿美味的鸭子大餐。 Guji Guji该怎么办？它终于想通了：自己既不是鳄鱼也不是鸭子，而是独一无二的「鳄鱼鸭」，然后用计让鳄鱼落荒而逃，保护亲爱的鸭子手足及鸭妈妈。
从此，大家视GujiGuji为英雄，他也决定快乐的做自己！从小到大，我们其实不断面临着「你站在谁那一边？」的问题，这个生动的故事带领我们学习尊重与包容。

"Chen's vivid characters -- the exuberantly befuddled ''crocoduck'' and his adopted family, the riotously creepy crocodiles that loom like shadows -- are rendered with wit and warmth...Love overcomes all differences here, and Guji Guji's antics are laugh-out-loud adorable." --- The New York Times Book Review

"This beautifully written story has much to say about appreciating families and differences, and it will resonate with children long after the final page is turned...a must-have for any collection." --- School Library Journal (Starred Review)

"...Muted ink-and-wash drawings of gray and brown makes this picture book look like an old classic...Chen's story of love, acceptance and self-discovery gives every sign of becoming a well-worn favorite." --- Publishers Weekly