Whales, the giants of the ocean. Nowadays it is becoming rarer to see these marine animals. In some areas, the population does seem to be increasing which is fantastic but still not as many as there was at the turn of the last century. Several companies offer whale snorkelling tours combined with reef diving. Most destinations will not allow diving close to whales to your safety and that it's hard to keep up with a whale (yes they swim fast but don't forget they also dive very deep..).