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Published 10:40 9 Apr 2015 BST
Updated 22:00 8 Jun 2016 BST

"A big reason I wanted to make this book is to promote the cause of water safety for babies. I just want to let people know about the benefits of these classes and that they are something to strongly consider," said Seth.
With a limited window to get the shot - the babies are put under the water for just a couple of seconds - he photographed around 750 babies during swimming lessons at pools across ten different states in the US.
As the mum of a real life water baby, I think this is a great way to highlight an important issue. Plus, the photos are pretty funny - have a look at some for yourself...
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