Once, the ocean was full of friends. Then a little jellyfish notices that things are changing--friends are disappearing! He sets out to discover the truth and learns that everyone has a part to play in protecting the careful balance of the ocean. "Bloom" refers to a substantial increase in jellyfish population that can be caused by climate change and pollution. In this beautifully illustrated, timely, and topical tale, the jellyfish band together to deliver an important message.