Mister Seahorse tells the story of a father-to-be seahorse, and his encounters with a variety of other male sea creatures who are also awaiting little ones - and who are all acting as 'primary carers'.
We meet Mr. Tilapia, who is holding his eggs in his mouth, Mr. Kurtus, who holds them on his head, and many other expectant new age dads.
The message gets a bit lost at one point - for example, when Mr. Bullhead says he is 'babysitting' - and it seems as if perhaps more could have been made of the theme. The ending isn't really consistent with the rest of the story, and the flow is interrupted by encounters with other sea creatures that have nothing to do with the main plot.
Nevertheless, it is an excellent idea, with a very important message for children, and it has the unmistakable imprint and vibrant colours of Eric Carle's unique artistic style. For very young readers, the repetition - and other criticism here - would not really be an issue.