On their second mission to find another habitable planet, the four mutant animals, LaserShark, AstroWolf, SmartHawk, and StinkBug, splash land on the Water Planet, run by some suspiciously friendly clams, who are very eager to swap planets--and if the AstroNuts can stop arguing among themselves they may find out why before it is too late.

Alba the fish has spent her entire life collecting precious objects that drift down to the ocean floor. From delicate shells to brightly colored coral, each year on her birthday she gathers one more precious item. But over the years, Alba notices her collection is losing its sparkle and that the world is changing. There is trash everywhere! When, on her birthday hunt, something unthinkable happens, it seems like the plastic may have changed her ocean...