Now heat a cast-iron skillet to medium-high until the oil starts to shimmer.
Carefully place the halibut in and cook for roughly 4 minutes per side.
Press down the flesh with a spatula, this will help achieve that golden crust.
Do not overcook. Remember, fish keep cooking after you remove it from the pan. Pull it earlier and let it rest. Only then will you have a pan-seared halibut cooked to perfection.