Crab meat is rich in vitamin A and calcium, phosphorus, iron, vitamin B1, vitamin B2, vitamin C, glutamic acid, glycine, histidine, arginine, niacin and so on. Crab meat is cold, salty, with the ability to soothe muscles and qi, rationalize stomach and digest food, pass through meridians, dissipate heat, clear heat, nourish yin, and can treat bruises, tendon fractures, and allergic dermatitis. In addition, crab meat has a good effect on hypertension, arteriosclerosis, cerebral thrombosis, hyperlipidemia and various cancers. Do you know how big their family is?
The body color of the pike crab varies with its surroundings. Individuals living on a sandy bottom, the cephalothorax is pike crab 2 light gray-green, the anterior gill area has a round white spot, the claw foot is mostly purple-red with white spots, part or the entire ventral surface is white, the first 3 pairs of foot segments and wrist segments are also white, the palms are blue-white, soft hairy brown, the knuckles are purple or purple-red, and the 4th pair of footlets are green with white spots, and the fingers are purple-blue. Individuals living among seagrasses are darker in color. It is omnivorous, and fish, shrimp, shellfish, and algae are all eaten, and even eat the same kind, preferring to eat animal carcasses.
Hairy crabs are also known as river crabs, crabs, clear water hairy crabs, the scientific name of the Chinese river crab. There are more than 500 species of crabs in China, and river crabs are the most abundant freshwater crabs among Chinese crabs. Hairy crab is favored by consumers at home and abroad for its rich nutrition and delicious meat. At present, hairy crab has become the main aquaculture species in various places, and the hair crab farming industry has changed from the "big crab" that pursues production to the big crab and "ecological crab" centered on quality and efficiency. In addition, there is a tea that is called "hairy crab tea".
King crabs are large, weighing up to 10 kilograms at large. King crabs grow slowly and can live up to 30 years. On the outside, the king crab is about 25 cm wide and has legs about 1 meter long, which is the largest of the crustaceans. The whole body is covered with hard thorns. The legs of the king crab are long and thick, and 3 pairs of feet are visible except for a pair of claws. The chelate on the left is slightly larger than the one on the right. In addition, most crabs seen are generally seen moving laterally. King crabs can move not only laterally but also vertically.
The dorsal carapace of the bread crab head is very long, with 5 longitudinal verrucous protrusions on the surface, soft hairs on the side, narrow forehead, concave leading edge, divided into 2 teeth, small eye socket, granular teeth on the anterior lateral margin, 3 teeth on the posterior lateral margin, 1 round blunt tooth in the middle of the posterior margin, and 4 triangular sharp teeth on each side. The shape of the claw is asymmetrical, with thicker knuckles on the right and a tighter forehead when the claws are contracted. The foot is slender and smooth. The abdomen of the male is long striped, the third to fifth segments are healed, the segments are recognizable, the sixth segment is nearly rectangular, and the seventh segment is sharply triangular. The female abdomen is broad and long, with the sixth segment nearly rectangular and the seventh segment triangular.
Tiger crab, also known as frog crab is a kind of animal of the genus Frog crab of the decapod frog crab family, commonly known as sea bugs, shrimp and cockroach heads, and its appearance resembles frogs, but also frog crabs, tiger crabs (crab cover texture and color like tiger skin patterns), Garfield crabs (because of the shape of Garfield), retrograde purr (Hokkien) and so on.
The cephalothorax of the hairy crab is rounded and square, and the posterior half is wider than the anterior half. The dorsal bulge, the forehead and hepatic areas are sunken, and there are 6 symmetrical protrusions in front of the gastric area, each with particles. The gastric area is significantly demarcated from the heart, with pits around the former. The forehead is wide and divided into four teeth. The upper edge of the eye socket protrudes near the middle and is triangular. The anterior margin has four sharp teeth, the last of which is the smallest, and introduces a ridge that runs diagonally on the outside of the gill area, and a rumble along the inner side of the posterior margin. The clawed foot, male and female, are densely hairy on the inside and outside of the palmar and knuckle base, and the inner and outer horns of the wrist node have a sharp edge, and the dorsal margin of the long node has the same sharp spine at the end of the long segment and the long section of the foot. The last three pairs of steps are relatively flat, with bristles on the dorsal margins of the carpal and anterior segments, and the dorsal and ventral margins of the anterior segments and the base of the knuckles in the fourth step are densely bristled. Abdomen, female round male tip. Cephalothorax is 54. 6 mm, width 61. 0 mm.
The white jade crab has a narrow and short forehead, a straight leading edge, and a slightly concave surface center. The lateral margin of the cephalothorax has scattered granules, the posterior margin of the male is more straight, and the female is slightly prominent. The claws are stout, the male is larger than the female, the long nodes are cylindrical, the base of the dorsal back, the anterior and posterior edges are densely grained, the dorsal and ventral surfaces of the wrist are raised, the inner edge has rough particles, the outer edge has granular rumination, and the inner edge of the two fingers has fine teeth. The foot is nearly cylindrical, smooth, with a leading edge of the anterior segment with a 1 rumbling, a sharp posterior margin, a flat knuckle, a longitudinal rumble in the middle, a thin and sharp edge, and a sharp end. The male's first abdominal limb is pin-shaped at the end of the rod, slightly curved outward. The abdomen is sharply triangular, and the second to fifth segments heal. Females have rounded abdomen, the third to sixth segments heal, and the caudal segment is oblong. Male cephalothorax 18.7–22.7 mm long and 17.5–21.7 mm wide; Females are 19.5 to 20.5 mm long and 18.3–19.3 mm wide. It lives on muddy sand beaches in shallow waters and low tide lines, and the breeding season is from May to June.