Pomerania parviflora is the swim bladder of wild Dahongfish, and its producing areas are generally Thailand, Indonesia, Malaysia and Vietnam. The first two producing areas are quite rare in the market, and the prices are also very high. Most of them are Vietnamese.

Spider-bellied man in Indonesia is one of the top varieties of flower gum, which has a miraculous effect on the auxiliary treatment of children's chronic cough and bronchitis, and is a good choice for moistening the lungs, preserving health and caring skin.

Spider gum is very famous in Hong Kong and other southern places, and its price has been on the rise for more than ten years. An Indonesian spider-bellied man weighing more than 30 grams is becoming more and more rare, and one weighing more than 50 grams is extremely rare, which deserves to be treasured like an antique.

Spider gum can be divided into male and female. When Hong Kong people choose spider gum, they especially like to have a "tendon" in the middle of their stomachs. This is spider gum. Hong Kong people like to eat the tripe of sole and spider, while the mother glue of spider gum has no "tendon".