The young seals played together ; the unicorn fish, armed with its long, straight, and conical arm, which it uses to saw the ice-fields, pursued the timid cetaceans, innumerable whales spouting columns of water and mucilage ; the north-caper, with its loose tail and training fins, cutting the waves with wonderful rapidity, feeding itself as it goes with animals as rapid as itself, whilst the idler white whale swallows tranquilly molluscs as indolent as it is.