There are many seafood stalls in Qingdao that are worth visiting, here are some recommendations:

1. Nine Turns Large Intestine: This is a specialty seafood stall that focuses on cooking large intestines, and is located in the commercial area of Caoxian Road in the north part of Shibei District, next to the Science and Technology Street, and very close to the Seafood Market and Beer Street. Their signature dish is the nine-turned large intestine, which is very distinctive and has a delicious taste that brings back memories.

2. Old Qingdao Seafood Stall: This is a long-established seafood stall that has been operating in Qingdao for many years, and is located near Jiangsu Road in Shinan District. Their dishes are mainly fresh and original, especially seafood dishes, which are well worth trying.

3. Boat Song Fish Dumpling (seafood, dumplings): This is a seafood and dumpling oriented restaurant located in the food street of Yunxiao Road, Shinan District. Their dumplings are very unique, especially the Spanish mackerel dumplings, which have a delicious taste and are one of the must-try dishes.

4. Dafuyuan Restaurant: This is an old seafood restaurant that has been operating in Qingdao for many years and is located on Dafuyuan Road in Shibei District. Their dishes are based on freshness and original flavor, especially seafood dishes, which are well worth trying.

5. Wild Wonton BBQ: This is a very famous BBQ restaurant in Qingdao, located near Jiangsu Road in Shinan District. Their wontons and barbecue are very unique, especially the kebabs and grilled fish, which are delicious and one of the must-try dishes.

Overall, Qingdao has many worthwhile seafood stalls and restaurants that offer not only fresh seafood cuisine, but also a unique cultural atmosphere with Qingdao characteristics. While savoring the food in these places, you can also feel the unique charm of Qingdao as a seaside city.