Cuttlefish is different from flatfish. Cuttlefish is another name for squid, and flatfish is short for flatfish. They have different eyes, different shapes, different skin colors and different nutritional values. We can distinguish cuttlefish from flatfish through these aspects, and the method is also very simple. 1, eyes are different: cuttlefish looks more like squid, cuttlefish's eyes are on both sides, and mullet's eyes are on the same side. 2. Different shapes: The cuttlefish has a round belly and no bones, and it is a marine mollusk, while the mullet is slender and has a spindle bone in its body, which inhabits the bottom of the nearby shallow sea. 3. Different skin color: The cuttlefish is covered with a layer of black mucus before cleaning. After cleaning, the cuttlefish is very white, even the bones are white. The cuttlefish is still a Chinese herbal medicine, while the skin color of the squid is white and pink. 4. Different nutritional values: cuttlefish is rich in protein, and its shell contains calcium carbonate, cutin, etc., which has anti-virus and anti-radiation effects, while halibut is rich in unsaturated fatty acids and magnesium, which is beneficial to blood circulation, and halibut has the value of clearing away heat, eliminating phlegm, relieving cough, diuresis and detumescence.