Appealing hopefulness infuses the implausible tale of Alba, an orange fish who lives in a reef where -shimmering fish darted and dived, and strange creatures scuttled into hidden places.- She loves to collect things, but over time, -Alba found fewer beautiful objects... and slowly, more trash started to appear.- Hawthorne-s clean-edged watercolor and gouache illustrations conjure the dismal fate of the dazzling reef-a four-panel spread shows the trash piling up and the color leaching away. When Alba spots a pearl in a plastic bottle, she is trapped trying to retrieve it. After rescuing Alba, a girl named Kaia tells everyone in her community -how dangerous their plastic and trash were making the oceans.- The town cleans up the mess over the course of a single page turn, even installing wind turbines, and Kaia returns home to a recovering reef. Closing spreads identify animals in the reef and ways to take care of the ocean, but the book-s simplistic, speedy approach to cleanup may not impress upon readers the scale of the actions needed. Ages 3-7. (Mar.)