The Octonauts is a series of children's adventure books written by Vicki Wong and Michael Murphy of MEOMI.
The wonderfully illustrated book is about a crew of cute critters, including a polar bear, daredevil kitten, dumbo octopus, penguin, and a mysterious vegimal (part vegetable/part animal), who love to explore the sea (they even have an "Octopod" base).
Take a look at their cute illustrations: Link (sample 1, sample 2)- via COLOURlovers