The yellow color inside the crab is crab yolk. Usually the crab yolk should be lumpy or yellow powdery sandy after cooking, while the scanty crab yolk may be undercooked, so it needs to be cooked again until it is well done. Crab yolk is the ovary and digestive gland of the crab, not just the egg. Crab yolk contains high levels of oil and cholesterol.

The yellowish color inside the crab is the yolk. Usually, crab yolk should be lumpy or yellowish powdery sandy when cooked, and the scanty crab yolk may be undercooked, so it needs to be cooked again until it is well done. Crab yolk is the ovary and digestive gland of the crab, not just the egg. Crab yolk contains high levels of oil and cholesterol.