What to do when the fish dies and you can't release it.

Oh, Cod!
From allrecipes.com

2 tablespoons olive oil
1/2 onion, chopped
White Onion, Large
1 clove garlic, chopped
1 teaspoon lemon pepper
1 (3 ounce) fillet cod, or more to taste
2 tablespoons dry white wine
1 tablespoon grated Parmesan cheese, or to taste (optional)

Heat olive oil in a large frying pan over medium-high heat; cook and stir onion, garlic, and lemon pepper until onion is slightly tender, about 3 minutes. Add cod to the frying pan, flipping the cod over to coat both sides with oil.
2. Cook cod in the onion mixture until it flakes easily with a fork, occasionally sliding fish around so it doesn't stick, about 4 minutes per side.
3. Pour wine into the frying pan and bring to a boil while scraping the browned bits of food off of the bottom of the pan with a wooden spoon. Slide the cod around the pan, flip it over, and slide around again until coated in wine, about 1 minute.
4. Transfer cod to a serving plate; top with onion mixture and Parmesan cheese.