Langya Glass Eel

Langya Glass Eel

Langya Glass Eel is a geographical indication certification trademark.

Langya Glass Eel is a geographical indication agricultural product.

　　Glass eel, commonly known as "noodle fish," is widely distributed across China, but its quality varies. Among them, the Langya glass eel from Jiaonan City is considered the best—small in size, with delicate flesh, excellent taste, and rich in various nutrients. Fishermen in Langya Town and surrounding areas have a long-standing tradition of processing and producing glass eel, which has developed into an important local industry, with products sold across the country.

　　Since 2012, Jiaonan City has designated the sea area around Langya Town as a geographical indication protection zone for agricultural products. The city has completed all necessary documentation and actively applied to the National Agricultural Geographical Indications Registration Expert Review Committee for certification. This effort aims to protect this unique local variety, enhance the brand influence of Langya Glass Eel, and promote the development of the local glass eel processing industry.

　　The geographical indication protection zone for Langya Glass Eel as an agricultural product covers Langya Town under the jurisdiction of Jiaonan City. The glass eel (Ammodytes personatus), belonging to the family Ammodytidae and genus Ammodytes, is nicknamed "noodle fish" locally due to its resemblance to the noodles commonly seen in rural Shandong households. It is also known as "sand driller." This small fish inhabits coastal sandy and muddy areas, with a cylindrical body that is slightly laterally compressed. Adult fish are about 10–13 cm in length. The protected sea area boasts abundant marine life, vast waters, no major inflowing rivers, minimal influence from the mainland, unpolluted water quality, and relatively stable hydrological conditions. Historical fishing data on glass eel indicate that excessive, intensive, and prolonged fishing has led to noticeable changes in glass eel resources. Langya Glass Eel is delicious and highly nutritious, rich in essential amino acids (≥11.64%), protein (≥15.8%), fat...<5.4％）、钙（≥362mg/100g）及铁（≥1.49mg/100g）等，为鱼类上品。

　　Geographical Scope

　　The geographical indication protection zone for Langya Glass Eel as an agricultural product covers Langya Town under the jurisdiction of Jiaonan City. The specific geographic coordinates are: (1) N35°37′29.65″, E 119°56′11.76″; (2) N35°35′18.11″, E 119°57′58.01″; (3) N35°31′20.33″, E 119°52′13.97″; (4) N35°33′29.84″, E 119°50′33.80″. The protected sea area within the range formed by these four points covers a total area of 5,366.812 hectares.

　　Product Quality Characteristics

　　Langya Glass Eel has a cylindrical body that is slightly laterally compressed, with adults reaching over 10 cm in length. It has 57–58 dorsal fin rays, 4–5 anal and pectoral fin rays, 5 branched tail fin rays, and no pelvic fins. The anterior gill arch has 7 gill rakers. The body is semi-transparent, with light green sides, a grayish-black back edge, and a white belly. It has a large mouth with canine teeth. As shown in the table, Langya Glass Eel is delicious and highly nutritious, rich in essential amino acids (≥0.64%), protein (≥5.8%), fat...<5.4％、钙≥6mg/g及铁≥0.49mg/g等，为鱼类上品。