Happy Little Submarine 3 Rainbow Treasure-潜艇总动员3：彩虹宝藏

300 years ago, the coastal residents could not bear the oppression and plunder of foreign colonial invaders, so they formed pirates to fight against the colonists. The pirates robbed the colonists treasures and buried them in a mysterious sea. Legend has it that the mountains of treasures shone and turned into beautiful rainbows. From then on, the pirates and their treasures were famous for rainbows. Beaver Bobo (voiced by Xie Yuanzhen), who claimed to be a descendant of the Rainbow Pirates, told the legend to the underwater residents, which attracted the seahorse family who failed to find the treasure and the fierce and mysterious one-eyed shark (voiced by Tan Mantang). In a critical moment, Bobo was rescued by the small submarine Ali (voiced by Fan Churong). They took the small submarine Beibei (voiced by Hong Haitian) and the seahorse family and embarked on a journey to find the rainbow treasure. What will be waiting for these adventurers at the end of the vast ocean?