Medium sized hand crab, also known as medium-sized imitation hand crab. Its Latin scientific name is Sesarmops intermedius (De Haan, 1835). As a common member of the Sesarmidae family, it is also one of the common products in ornamental crabs. Their body color ranges from dark red to bright red, with a few individuals having a dark green red color on their back shell. Its claws gradually turn from red to white from the palmar nodes to the tips of the movable and fixed fingers. Legs are usually orange in color with a white belly.

The spotted hand crab (scientific name: Parasesarma pictum), also known as the miraculous hand crab, formerly belonged to the family Crabaidae and the genus Parasesarma. Later, the family Parasesarma separated from the family and was reclassified as the genus Parasesarma. Distributed in North Korea, Japan, Indonesia, South China, and East China (Guangdong, Hong Kong, Fujian, Taiwan, Zhejiang, Shandong), the living environment is seawater, mainly inhabiting under or near rocks at low tide lines.

The spotted hand crab (scientific name: Parasesarma pictum), also known as the miraculous hand crab, formerly belonged to the family Crabaidae and the genus Parasesarma. Later, the family Parasesarma separated from the family and was reclassified as the genus Parasesarma. Distributed in North Korea, Japan, Indonesia, South China, and East China (Guangdong, Hong Kong, Fujian, Taiwan, Zhejiang, Shandong), the living environment is seawater, mainly inhabiting under or near rocks at low tide lines.

The red clawed mantis arm crab is an arthropod belonging to the family Characidae in the order Decapoda. The width of the head and chest armor is slightly larger than its length, square in shape, and has a smooth surface. Wide forehead, straight leading edge, sharp ridge behind forehead; The outer eye socket is triangular in shape; Sharp and toothless edges. Steps 1-4: The last 3 segments of the foot have black hard bristles; Abdominal triangle, tail segment nearly circular. Male claws are larger than females, with high palmar nodes and granular dorsal edges. The middle of the inner side has granules, while the outer side is smooth and often blood red in color; The gap between the two fingers of the male claw is larger than that of the female claw, and the inner edges of the two fingers are serrated, with one larger tooth at each end. The female abdomen is round and large.

The red clawed mantis arm crab is an arthropod belonging to the family Characidae in the order Decapoda. The width of the head and chest armor is slightly larger than its length, square in shape, and has a smooth surface. Wide forehead, straight leading edge, sharp ridge behind forehead; The outer eye socket is triangular in shape; Sharp and toothless edges. Steps 1-4: The last 3 segments of the foot have black hard bristles; Abdominal triangle, tail segment nearly circular. Male claws are larger than females, with high palmar nodes and granular dorsal edges. The middle of the inner side has granules, while the outer side is smooth and often blood red in color; The gap between the two fingers of the male claw is larger than that of the female claw, and the inner edges of the two fingers are serrated, with one larger tooth at each end. The female abdomen is round and large.

The Sesarma bidens, also known as the Double Toothed Hand Crab, belongs to the family Crabs and the genus Sesarma. The two tooth hand crab is distributed in North Korea, Japan, the Philippines, the Malay Islands, Andaman, Sri Lanka, India, Taiwan Island, as well as Guangxi, Guangdong, Hong Kong, Fujian and other places in the Chinese Mainland. Its living environment is seawater, which is mostly found on mudflats near estuaries and far away from water.

Chiromantes dehaani, formerly known as Chiromantes dehaani, originally belonged to the family Characidae and genus Chiromantes. After separating from the family Characidae, Chiromantes dehaani was reclassified as Chiromantes and genus Chiromantes dehaani. It is distributed in Korea, Japan, Taiwan Island, Hainan Island, Guangdong, Fujian, Zhejiang, Jiangsu, Liaodong Peninsula and other places in Chinese Mainland, and generally lives on the muddy banks of offshore freshwater rivers or in offshore marshes. It is the second intermediate host of mouse lung flukes.

The red clawed hand crab is an arthropod belonging to the family Tetraodontidae in the order Decapoda. The width of the head and chest armor is slightly larger than its length, square in shape, and has a smooth surface. Wide forehead, straight leading edge, sharp ridge behind forehead; The outer eye socket is triangular in shape; Sharp and toothless edges. Steps 1-4: The last 3 segments of the foot have black hard bristles; Abdominal triangle, tail segment nearly circular. Male claws are larger than females, with high palmar nodes and granular dorsal edges. The middle of the inner side has granules, while the outer side is smooth and often blood red in color; The gap between the two fingers of the male claw is larger than that of the female claw, and the inner edges of the two fingers are serrated, with one larger tooth at each end. The female abdomen is round and large.