In between two snorkeling sessions you can enjoy lunch, freshly cooked on board, and served in the big saloon. Practice breathing through the snorkel with your head out of the water before the real thing. Put the mask on your head (wear your strap slightly high on the back of your head and not too tight!), suck it into your face, breathe through the tube (put the mouthpiece all the way in your mouth, like a football players mouthpiece and close your lips around it). Don't bite, just rest your teeth on the bite thingies – or your jaw will get really sor