Italy's favourite Tuna *Market leader in Italy (IRI data Y.E. Sept 2019) Less water, more taste. Rio Mare Natura is truly natural tuna - rich in taste, it contains only a drop of water. Rio Mare Natura is delicious, soft and compact, rich in protein with just 0.5% fat - no need to drain. A patented technology means only a very small amount of water is needed during the canning process thereby protecting the authentic taste of tuna. All the tuna flavour with just 0.5% fat - ideal for light, simple yet tasty dishes.