Making Healthy Snack Choices By Summer Smith - June 7, 2013 FacebookTwitterWhatsApp Whole-Wheat Crackers & Canned Tuna A can of tuna not only provides lots of protein, it’s also a great source of omaga-3s! One can of tuna (packaged in water, not oils) scooped onto around 6 whole-wheat crackers makes for an excellent snack! Protein | 20 grams Fiber | 3 grams