1. Differences in medicinal value:

1. Red crab Crab is delicious but cold in nature. Crab meat has the effect of nourishing muscles and relaxing qi, while rice wine has a mellow aroma. The effect of warming, activating blood and dispelling cold, the two complement each other.

2. Stone crab has the effects of clearing away heat and promoting dampness, reducing swelling and detoxification, and improving eyesight. Used for damp-heat stranguria, leukorrhagia, sore throat, carbuncle, lacquer sore, blue blindness, red eyes, and film covering the eyes.

2. Differences in shape:

1. The red crab has a transverse oval-shaped head and breastplate, a hard shell, thick claws, and is aggressive in nature. It likes to live in low-tide rocky areas and dense seaweed areas. There are many rocks along the coast of Rushan, densely covered with seaweed, and rich in food. It is the main reproductive area of ??red beetles.

2. Stone crabs are crab-like with all angles, flat oval or nearly hexagonal oval, a few are spindle-shaped, 3.5-8cm long, 3-6cm wide, 1-2cm thick, gray or light gray brown to light tan. The back is slightly raised, some are smooth and shiny, some have the texture on the back of a crab, and some still have residual shells of other organisms attached; the abdomen is mostly slightly concave, and the surface is sometimes damaged; most of the jointed feet are incomplete; The entire depression and foot faults are often filled with mudstone.

Extended information:

Nutritional value

Rushan’s Chijiahong is big, tender and delicious, and contains a lot of protein, fat, carbohydrates, Inorganic salts and A and B vitamins are rich in nutrients. Local fishermen often use crab pots to trap red crabs.

Rushan Chijiahong is the fattest in late spring and mid-autumn. Fishermen often call it "wheat yellow crab" and "bean yellow crab", which refers to the crabs in these two seasons. There are also local proverbs that "eat crab roe in August and get fat on top" and "eat sharp navel in spring and round in autumn".

The former refers to the eighth month of the lunar calendar, which is when crabs are at their fattest. The latter refers to the fact that the male crabs in spring (the navel is pointed) are large and tender and have the freshest taste; the female crabs in the autumn (the navel is round) are full of fat and taste the most delicious.

Baidu Encyclopedia—Stone Crab

Baidu Encyclopedia—Red Sea Crab