What item can be added to a salad for an up-charge that is a seafood option?

The item that can be added to a salad for an up-charge, specifically as a seafood option, is blackened shrimp. Blackened shrimp is a popular choice for salads due to its flavorful seasoning and appealing texture, enhancing the overall taste of the salad. It's commonly offered as a protein addition, allowing guests to elevate their salad with a delicious seafood component.

Grilled tilapia, fried calamari, and salmon fillet are certainly tasty options as well, but the specific selection of blackened shrimp often stands out on menus as a unique and bold choice that can complement a variety of salad ingredients, particularly in restaurants where a spicy, smoky flavor profile is appreciated.