Score the skin side of the sea bass fillet (make a few small slit marks in the skin with a sharp knife). Season the fish with salt and pepper.
Preheat a medium saute pan over high heat and add 2 ounces of olive oil. When the oil is smoking, add the fish, skin side down. Reduce heat to medium and press fillet with a spatula to crisp the skin. When the skin is browned, flip fish. (The total cooking time for the fish should be 5 minutes).
Remove from pan and keep warm.
Add the remaining 2 ounces olive oil to the saute pan.
Add the corn, onion, red pepper, and poblano pepper and saute for 1 minute.
Add the crabmeat, chives, and chopped thyme, stirring to blend. Adjust seasoning to taste.
Add the chicken stock and whisk in the butter to form a sauce. Reduce until sauce consistency.
Arrange the sauteed vegetable mixture in a large serving bowl. Top with the warm bass fillet and roasted fingerling potatoes.