第 1 集: 兩隻螃蟹兄弟穿越危險的淡水掠食者，尋找失蹤的父親。

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Two crab brothers embark on a grand underwater adventure to find their father, after an accident carries him far downstream. Depicted as tiny beings in a large and merciless natural world, the brothers must evade a series of freshwater predators if they are ever to reunite with their family again. (Source: GKIDS)