Scallops are characterized by having two types of meat in one shell: the adductor muscle, called "scallop", which is white and meaty, and the roe, called "coral", which is red or white and soft. Sometimes, markets sell scallops already prepared in the shell, with only the adductor muscle intact. Outside the U.S., the scallop is often sold whole. In Galician cuisine, scallops are baked with bread crumbs, ham, and onions. In the UK and Australia, they are available both with and without the roe. The roe is also usually eaten. Scallops without any additives are called "dry packed", while scallops that are treated with sodium tripolyphosphate (STPP) are called "wet packed". STPP causes the scallops to absorb moisture prior to the freezing process, thereby increasing the weight. The freezing process takes about two days.
In Japanese cuisine, scallops may be served in soup or prepared as sashimi or sushi. Dried scallop is known in Cantonese Chinese cuisine as conpoy (乾瑤柱, 乾貝, 干貝). In a sushi bar, hotategai (帆立貝, 海扇) is the traditional scallop on rice, and while kaibashira (貝柱) may be called scallops, it is actually the adductor muscle of any kind of shellfish, e.g. mussels, oysters, or clams.
Scallops have lent their name to the culinary term 'scalloped', which originally referred to seafood creamed and served hot in the shell. Today, it means a creamed casserole dish such as scalloped potatoes, which contains no seafood at all. Smoked scallops are sometimes served as appetizers or as an ingredient in the preparation of various dishes and appetizers.