Crabs usually range in color from yellow to reddish-brown, depending on variety. A large crab may weigh several pounds. In Taiwan, they are found in large quantities during the spring, making them relatively inexpensive.
「蟳」是一種蟹蓋呈橢圓型無尖角之海蟹，全身呈青黃，微帶棕紅色，形大者一隻足有一斤多重，在台灣春季較多而長滿膏黃，肉質韌滑鮮美，係福建沿海海產之王。