Bring a large pot of salted water to a boil and cook the whole wheat linguine according to package instructions until al dente.
Reserve 2 tablespoons of the pasta cooking water, then drain the noodles and set them aside.
Pat the raw shrimp dry with paper towels and season them evenly with the sea salt and black pepper.
In a large skillet, heat the olive oil and ghee over medium-high heat until the fat is shimmering.
Add the shrimp to the skillet in a single layer and sear for approximately 2 minutes per side until they turn pink and opaque.
Remove the cooked shrimp from the pan and set them aside on a plate to prevent overcooking.
Reduce the heat to medium and add the minced garlic and red pepper flakes to the remaining fat in the pan, sautéing for 30 to 60 seconds until highly fragrant.
Whisk in the lemon juice and the reserved pasta water, scraping the bottom of the pan to release any flavorful browned bits.
Add the cooked linguine, seared shrimp, lemon zest, and chopped parsley back into the skillet.
Toss everything together for 1 minute until the pasta is well-coated in the garlic butter sauce and serve immediately.