Chapter 9At first, Pettic found it difficult to concentrate on breathing using his new gills. His body wanted to use his lungs, but he managed to over-ride it. He found that as he used his gills more efficiently, the desire to breathe with his lungs decreased and when the three reached the caves that undermined what he thought of as his island, he found it almost second nature. The sea did not seem to be very deep and light penetrated almost to the bottom. a multitude of colourful fishes swam around the many rocks which covered the sea bed. Every now and then there were beds of kelp and other seaweeds. These seemed to congregate together, as if they had been planted. Pettic wanted to ask Kinne but he could not think how to speak under the water. Suddenly, Stannia, who had been leading th

