Bring a large pot of salted water to a boil and cook the brown rice linguine until al dente, approximately 8 to 10 minutes.
While the pasta cooks, finely mince the garlic cloves and roughly chop the fresh parsley.
In a large skillet over medium heat, melt the grass-fed butter until it begins to bubble slightly.
Add the minced garlic and red pepper flakes to the skillet, sautéing for 1 minute until fragrant but not browned.
Gently fold the lump crab meat into the skillet, being careful to keep the large chunks intact while heating through for 2 minutes.
Drain the cooked linguine, reserving 2 tablespoons of the starchy pasta water.
Add the linguine and the reserved pasta water to the skillet, tossing gently to coat every strand in the garlic butter sauce.
Remove from heat and stir in the fresh lemon juice, sea salt, black pepper, and chopped parsley before serving.