Rinse the Seafood Blend with cold water, drain, and set aside. Pat dry with paper towels.
Bring a pot of water to a boil and cook the spaghetti according to the package instructions until al dente. Drain and set aside.
Heat a skillet over medium heat. Add the olive oil and butter, then sauté the garlic until it turns light brown. Add the seafood blend and ground black pepper, stirring until they are halfway cooked. Next, add the clam juice, salt, crushed red pepper, and lemon juice. Adjust the flavor by adding more salt and lemon juice as needed.
Transfer the spaghetti to the skillet and stir to combine well with the seafood blend. Add the cherry tomatoes and chopped parsley, mixing everything together. Turn off the heat and serve immediately.