First, let's take a look at the macros. Each of these are listed in grams and as usual, normalized to 200 calories for easy comparison, so we're always comparing apples to apples.
| Crab | Tuna |
| Nutrient | crab | tuna |
| Protein | 44g | 44g |
| Carbohydrate | 0g | 0g |
| Fiber | 0g | 0g |
| Fat | 1g | 1g |
| Monounsat. Fat | 0g | 1g |
| Polyunsat. Fat | 0g | 1g |
| Saturated Fat | 0g | 0g |
Next, let's take a look at the Vitamin density. These values are shown in units of percent of recommended daily intake. And since we're showing 200 calories worth, this means anything above 10% is good.
| Nutrient | crab | tuna |
| Choline | 0% | 12% |
| Vitamin A | 3% | 5% |
| Vitamin C | 22% | 0% |
| Vitamin E | 0% | 5% |
| Vitamin K | 0% | 0% |
Crab have significantly more Vitamins C than tuna. Crab are a good source of Vitamin C, Niacin, Vitamin B6, Magnesium, Calcium, Iron. Crab are a great source of Phosphorus. Crab are an excellent source of Vitamin B12, Zinc. Tuna are a great source of Vitamin B6, Phosphorus, Iron. Tuna are an excellent source of Niacin, Vitamin B12.
And here we see the B-vitamins: B1 (Thiamin), B2 (Riboflavin), B3 (Niacin), B5 (Pantothenic Acid), B6 (Pyridoxine)
| Nutrient | crab | tuna |
| Vitamin B1 | 10% | 6% |
| Vitamin B2 | 9% | 12% |
| Vitamin B3 | 22% | 191% |
| Vitamin B5 | 17% | 7% |
| Vitamin B6 | 32% | 55% |
| Vitamin B12 | 1071% | 258% |
Now, lets look at mineral density. Here we have a lot of important electrolytes and minerals. Once again, units are in percent of RDI, thus for this 200 calorie serving anything above 10% would considered high.
| Nutrient | crab | tuna |
| Sodium | 133% | 39% |
| Potasium | 14% | 12% |
| Calcium | 22% | 4% |
| Magnesium | 33% | 13% |
| Phosphorus | 90% | 48% |
| Iron | 23% | 44% |
| Manganese | 4% | 1% |
| Selenium | 193% | 308% |
| Copper | 220% | 9% |
| Zinc | 151% | 14% |