McDonald's - the Filet-O-Fish Mcdonalds has a average-calorie, average-carb, high-fat and high-protein content.  
With 15 gms of protein, it is high in protein content, which is an important macronutrient that helps with tissue repair, provides energy and improves immunity.
However, the high fat content makes it unsuitable if you're on a low-fat diet plan. 
Based on the composite nutritive standing McDonald's - the Filet-O-Fish Mcdonalds has been given a composite ranking of 75, and in moderation.                       
| Calories from Protein | 17% | |
| Calories from Fat | 39% | |
| Calories from Carbs | 43% | 
| Name | Amount | %DV | Rank | Interpretation | 
|---|---|---|---|---|
| Total Carbohydrate | 37 g | 12.3% | 
| Name | Amount | %DV | Rank | Interpretation | 
|---|---|---|---|---|
| Protein | 15 g | 30% | 
| Name | Amount | %DV | Rank | Interpretation | 
|---|---|---|---|---|
| Total Fat | 15 g | 23.1% | 
Serving size
Amount Per Serving
Calories 345 Calories from Fat 135
% Daily Value *
Total Fat 15 g 23.1%
Saturated Fat
Trans Fat
Cholesterol
Sodium
Total Carbohydrates 37 g 12.3%
Dietary Fiber
Sugars
Protein 15 g 30%
Vitamin A Vitamin C
Calcium Iron
*Based on a 2000 Calorie diet
Per 100g | Calories 540
  Protein 25 g | Carbs 45 g | Fat 29 g
Per 100g | Calories 805
  Protein 47 g | Carbs 55 g | Fat 44 g
Per 100g | Calories 173
  Protein 0 g | Carbs 50 g | Fat 0 g
Per 100g | Calories 675
  Protein 42 g | Carbs 36 g | Fat 41 g
Per 100g | Calories 271
  Protein 10.9 g | Carbs 23.5 g | Fat 14.5 g
Per 100g | Calories 100
  Protein 8 g | Carbs 12 g | Fat 2.5 g
Per 100g | Calories 173
  Protein 0 g | Carbs 50 g | Fat 0 g
Per 100g | Calories 675
  Protein 42 g | Carbs 36 g | Fat 41 g