Rainbow Fish and his friends enjoy eating the krill, or tiny shrimp, that populate the ocean floor. When a big whale comes into the area, he starts eating krill, too. Soon the fish worry that he'll eat them, and they hide when he's around. The hurt whale pretends that is just what he's going to do, but in the end, Rainbow Fish and the whale have a laugh over the misunderstanding, and everything works out fine--except for the krill, of course. 《深海大冒险》
彩虹鱼因为好奇，想看看悬崖边下的情景，结果身上唯一的闪光鳞片掉了下去。彩虹鱼要找回自己的鳞片，于是一趟深海里的大冒险开始了！在黑黢黢的、隐藏着各种神奇生物的世界里，彩虹鱼能找回自己的闪光鳞片吗？