In the future (as seen from 1957), submersible game wardens herd whales around underwater ranges. The whales are food animals which, along with equally farmed seaweed, have solved the world’s food supply problems. The story is about an ex-engineer on a spaceliner who suffered an accident and gets a new start as a warden.
This book has aged quite badly. While much of Clarke’s space based science fiction can be read with enjoyment today, this one is just plain tedious. So tedious, in fact, that I only got about half way through before giving up. The technology is not really fascinating anymore, but that’s not the problem. There just doesn’t seem to be a story here, and the characters are completely uninteresting.