Follow a Grey Seal on an underwater journey in this richly illustrated Nature Storybook. Follow a Grey Seal on an underwater journey in this richly illustrated Nature Storybook. Lying about on the sand like a fat sunbather, Seal might seem like a slow, dozy creature - but nothing compares with his grace and speed when he's underwater! Seal can dive like a rocket and hunt like a harpoon. He can stay underwater for up to 15 minutes and dive to depths of 300 feet to find his prey. Find out all this and lots more about the super-swimming wonder in this fascinating book.