Twelve-year-old Caitlin's daily visits to the local aquarium after school bring her into contact with an elderly fellow aquarium lover, whom she befriends just as she discovers a shocking family secret.

Discusses selecting aquarium equipment, the care and feeding of fish, and using plants, shells, and other materials to decorate an aquarium.

Winter's surrogate mother, the very elderly dolphin Panama, has passed away, leaving Winter without the only poolmate she has ever known. However, the loss of Panama may have even greater repercussions for Winter, who, according to USDA regulations, cannot be housed alone, as dolphins' social behavior requires them to be paired with other dolphins. Time is running out to find a companion for her before the team at Clearwater loses their beloved Winter...

When George and the man in the yellow hat visit the aquarium, George's curiosity gets the better of him and he accidentally joins some of the exhibits.

"This encyclopedic reference presents clear, step-by-step, practical advice in a convenient week-by-week progression. From day one to week 12, detailed step-by-step photo sequences show you how to correctly set up a tropical freshwater aquarium and avoid the common pitfalls of fishkeeping so that you will have an aquarium to enjoy not for weeks or months, but for years,"--

While on a field trip to the aquarium, Nancy discovers that she loves all the different sea life except for jellyfish, but with the help of Ms. Glass and her friends, Nancy is able to overcome her fear of the gelatinous animals.