The Burgess Animal Book For Children in "The Mammals Of The Sea"

"I told you yesterday," began Old Mother Nature, "that the land is surrounded by water, salt water, sometimes called the ocean and sometimes the sea. In this live the largest animals in all the Great World and many others, some of which sometimes come on land, and others which never do.

"One of those which come on land is first cousin to Little Joe Otter and is named the Sea Otter.