In a small bowl, mix the grated ginger, turmeric powder, olive oil, lemon juice, coconut aminos, and garlic powder (if using).
Place the salmon fillets in a shallow dish and pour the marinade over them. Gently toss to coat each fillet evenly. Cover and refrigerate for at least 30 minutes to allow the flavors to infuse.
Preheat your oven to 375°F (190°C).
Remove the salmon from the marinade and place the fillets on a baking sheet lined with parchment paper. Season with sea salt.
Bake in the preheated oven for 15-20 minutes, or until the salmon flakes easily with a fork. The internal temperature should reach 145°F (63°C).
Let the salmon rest for a few minutes before serving to allow the juices to redistribute. Serve warm.