What is fish maw?

Fish maw (also known as fish maw or swim bladder) is a dried product made from the swim bladders of large marine fish that have been air-dried and processed. Since ancient times, it has been one of the "鮑參翅肚" (abalone, sea cucumber, shark fin, and fish maw), a top-tier tonic in Chinese culinary culture. A good piece of fish maw can range from a few hundred Hong Kong dollars to over a million, with its value determined by species, origin, age, and storage condition. If you want to learn about the other three treasures besides fish maw, you can read about bird's nest varieties and value, sea cucumber specifications, or cordyceps origin and grading.

Comparison of Main Fish Maw Varieties

Common fish maw varieties in the Hong Kong market, roughly listed in order of value from highest to lowest:

• Golden Coin Fish Maw (金錢鰵魚膠): Originating from large croakers in the deep seas of South America and the Indian Ocean, the maw is golden-yellow and translucent, with edges curling like ancient coins. Aged Golden Coin Fish Maw is a collector's item, with prices for those over 30 years old reaching six figures per tael. Further reading: Investing and collecting Croaker Fish Maw: a new choice.
• White Flower Fish Maw (白花膠): Mostly from South America, with a milky white color and fine texture. Old White Flower Fish Maw is sought after due to its scarcity and is commonly found in the high-end gift market.
• Red-lipped Fish Maw (赤嘴膠): Characterized by a reddish mouth area, distinct patterns, and thick texture. It is a staple in the medicinal food market.
• Spider Fish Maw (蜘蛛膠): Unique in shape, with edges resembling spider legs. It is rare, and its medicinal value is highly regarded in traditional medicine. Why is Spider Fish Maw so valuable?
• House Fish Maw (房膠): Thick but relatively affordable, a popular choice for everyday tonic for the public.
• Others: Beihai Fish Maw, Annam Fish Maw, Zhanjiang Fish Maw, Tawau Fish Maw, etc., named by region, each with its own characteristics.

Nutritional Composition and Efficacy of Fish Maw

Every 100 grams of fish maw contains approximately 84.4 grams of protein, 0.2 grams of fat, 50 milligrams of calcium, 29 milligrams of phosphorus, and 2.6 milligrams of iron. Its main components are highly viscous collagen and polysaccharides. In traditional Chinese medicine, fish maw is sweet and neutral in nature, entering the kidney and liver meridians. It nourishes the kidneys and essence, strengthens tendons and bones, stops bleeding, dispels stasis, and reduces swelling. It is commonly used for the following conditions:

• For women, to beautify the skin, improve skin elasticity and radiance.
• For postpartum mothers, for recuperation during confinement, post-surgical recovery, and conditioning for general weakness.
• For chronic coughs, lung deficiency with excessive phlegm, and frequent nocturnal urination.
• For men, to nourish the kidneys and alleviate lower back and knee soreness.

Common traditional dietary pairings: Fish maw stewed chicken soup, fish maw red date lean pork soup, fish maw stewed with rock sugar bird's nest. For detailed dietary recipes, refer to 3 tips for quickly rehydrating fish maw.

5 Key Factors Affecting the Value of Fish Maw

1. Species: Golden Coin Fish Maw > White Flower Fish Maw > Red-lipped Fish Maw > House Fish Maw, with a price difference of over 10 times.
2. Age: Aged fish maw has concentrated collagen, increasing its medicinal and collection value significantly. The same piece of Golden Coin Fish Maw can differ by 3–5 times in value between 30 years and 5 years old. See What makes fish maw have high recycling value and collection value.
3. Weight: For the same species, the larger the weight (in taels), the more valuable it is. A half tael and one tael can differ by more than double.
4. Appearance: Uniform color, clear texture, no spots, and no insect damage are best. For distinguishing genuine from fake, see Eight methods to distinguish genuine from fake fish maw.
5. Storage: Vacuum-sealed and refrigerated products maintain good quality. Moisture, mold, or an oily off-flavor will significantly reduce value. For specific methods, see How to store fish maw to prevent depreciation.

How to Store Fish Maw to Prevent Depreciation

Fish maw should be kept away from moisture and direct sunlight. It is recommended to wrap it in a breathable stocking or clean gauze, place it in an airtight bag, and then put it in a glass jar with food desiccant. Store it in a cool, dry place or the freezer compartment of a refrigerator. Air it out once every six months to prevent the oil lines from becoming damp.

Kam Hoi Shing — Professional Fish Maw Recycling in Hong Kong

Beyond understanding the medicinal value of fish maw, many customers also want to know the value of their fish maw at home. Kam Hoi Shing offers high-price fish maw recycling in Hong Kong — including Golden Coin Fish Maw, White Flower Fish Maw, Red-lipped Fish Maw, Spider Fish Maw, House Fish Maw, and aged fish maw. We provide instant valuations and cash recycling. You can also browse our recycled fish maw product page to see common varieties and price ranges, or view past fish maw recycling transaction cases.

Further Reading

• What is fish maw? A beginner's guide to nourishing collagen
• Why is fish maw so expensive?
• Which fish maw is better? All purchasing tips revealed
• Besides beauty and blood nourishment, what are the other benefits of fish maw?