The word "fish" refers to both the animal and to the food prepared from it. Three quarters of the Earth are covered by water, so fish has been an important part of the diet of humans in almost all countries in the world since the dawn of time. Seafoods can be prepared in a variety of ways. It can be uncooked (raw) (cf. sashimi). It can be cured by marinating (cf. escabeche), pickling (cf. pickled herring), or smoking (cf. smoked salmon). Or it can be cooked by baking, frying (cf. fish and chips), grilling, poaching (cf. court-bouillon), or steaming.