Can clams be eaten in the dark?

Edible, black part has two possibilities:

1 is the digestive system of Meretrix meretrix, which is inedible;

2, is not clean impurities, also can't eat.

Extended data:

Ruditapes philippinarum (scientific name: Ruditapes philippinarum): Also known as the variegated clam or Ruditapes philippinarum, its shell is 2.5-5.7 cm long. The general commercial scale is 40 mm. It is a common shellfish. The shell is firm, and the shell petals are equal left and right; The two sides are unequal, and the top beak of the shell is located in the first half; The shape is slightly oval. Ligaments are embedded, not protruding from the shell surface, and the broad brown oval arch extends almost to half of the rear edge.

The Philippine clam has great commercial value and has been introduced to all parts of the world, where it has been permanently colonized. The Philippine clam was accidentally introduced to the Pacific coast of North America with giant oyster seedlings in the 1930 s, and has spread to the coast from California to British Columbia and settled there. In addition to public fishing, hatching production has also promoted the culture of Philippine clams along the Pacific coast.

References:

Baidu Encyclopedia-Clam Philippines