Ginger Scallion Noodles with Black Sea Bass

Name: Ginger Scallion Noodles with Black Sea Bass
Cuisine: Asian, Chinese
Ingredients: "2 cups thinly sliced scallions (1 to 2 large bunches); 1/2 cup finely minced peeled fresh ginger; 3/4 cup grapeseed or other neutral oil such as canola; 1/2 tsp light soy sauce; 1/2 tsp fish sauce (optional); 1 tsp sherry vinegar (optional); 1 tsp sugar; 1 tsp kosher salt, or more to taste; 2 packs ramen noodles (fresh if possible); 1 tbsp hoisin sauce; 6 oz skin on filet of black bass or other white flaky fish such as cod