WellByNumbers.

Mussels (cooked) vs Oysters (cooked)

Mussels (cooked)Oysters (cooked)
Protein · per 100 g23.8 g11.4 g
Carbs · per 100 g7.4 g5.5 g
Fat · per 100 g4.5 g3.4 g
Fiber · per 100 g0.0 g0.0 g
Energy · per 100 g172.0 kcal102.0 kcal
Protein · per 100 kcal13.8 g11.2 g
To hit 30 g protein126 g · 217 kcal263 g · 268 kcal

The same three numbers, drawn

Protein / 100 g23.811.4Fiber / 100 g0.00.0Protein / 100 kcal13.811.2MusselsOysters

What 30 g of protein looks like on a plate

126 gMussels217 kcal rides along263 gOysters268 kcal rides alongsquare area drawn to scale · grams needed for 30 g protein

Where the calories come from

protein 58%carbs 18%fat 24%
protein 46%carbs 22%fat 31%

The one-line verdict: Mussels (cooked) delivers 1.2× the protein per calorie of Oysters (cooked) (13.8 g vs 11.2 g per 100 kcal).

More protein / 100 g: MusselsLighter per 100 g: OystersSmaller 30 g portion: Mussels

Swap in your own pair

Bold marks the better side of each row. "Per 100 kcal" answers the density question — which food delivers more protein for the energy it costs. Portion row is computed live from the same USDA base values shown on each food page.