Qian Ting Zong Dong Yuan: Haidi Liang Wanli

Ali, Beibe and Meisha, submarines, have befriended a group of adorable sea creatures at the bottom of the ocean. After they tell Ali about a frightening legend of a mysterious sea monster that supposedly disrupted the ecological balance of the ocean, he leads an expedition team with Beibe and Meisha to find the creature and return the balance.

(Source: Wikipedia)