Pat fish dry + season with salt/pep; heat 1 tbsp oil in a skillet over med-high + sear fish undisturbed 2-3 min; add 2 tbsp butter, flip fish + cook 3-4 min while basting fish with butter; continue to cook until fish is firm, opaque + cooked through

Boil a large pot of unsalted water + gently loosen linguine with hands; carefully place in water, stir immediately + boil 2-3 min until al dente, then drain + return to pot; toss pasta with salt/pep + 1-2 tbsp butter

Wash + dry parsley, remove stems + roughly chop; drizzle fish with lemon juice + toss with parsley

Divide pasta to plates, topping with fish + pan sauce