This a great book for any little one who loves learning about the sea and the creatures that live within it. I purchased this for my daughter when she was three. Her love of sea creatures began with Ariel, LOL. From that movie she got interested in sea horses, fish, lobsters, and the like. When I gave her this book, she was in heaven. The book is beautifully illustrated, and initially she would spend hours poring over the pictures (not uninterrupted hours of course, she was only 3, but....) Today, at age six, she still loves this book. Now she likes reading about the various animals portrayed in the book. Her three year old brother loves looking at the pictures, while she reads the book to him. I highly recommend this book for any child who loves the sea. The recommended age group is 5 and older, but, IMO, even children as young as 2 can appreciate this book.