To open a beer fish shop, we need to consider the following aspects to increase profitability:

1. Location: Choose to open a store in a location with a large traffic, such as the business district and around tourist attractions. This can improve the exposure of the store and attract more potential customers.

2. product selection: beer fish is a kind of delicious food with high popularity, but it can still be innovated and improved according to local taste preferences. Can provide different tastes of beer fish, and pay attention to the freshness and quality of ingredients.

3. excellent service: provide a good dining environment and service attitude to make customers feel comfortable and satisfied. You can consider adding other snacks or dishes to meet the needs of more customers.

4. marketing: use various effective marketing methods to attract customers. You can use social media, online ordering platforms and other channels for promotion, and at the same time, you can consider providing some promotional activities in the early stage of opening to attract more customers.

5. Cost control: Reasonable cost control can help improve profitability. Appropriate suppliers can be selected to reduce the cost of ingredients and inventory management to reduce waste.

It should be noted that the catering industry needs to pay attention to the changes in market demand, competitors' dynamics and the supply of ingredients, etc. Flexible response to market changes can better maintain stable profitability.