Julia Seal 
Bloom [EPUB ebook] 

Once, the ocean was full of friends. But lately, a little jellyfish named Luna has noticed that things are changing-friends are disappearing! When she sets out to find them, she discovers that everyone has a part to play in protecting the careful balance of the ocean. In this beautifully illustrated and timely tale, little Luna comes up with a powerful way to deliver a message that inspires helpfulness and hope.