For the salsa, clean and wash spring onions and chillies and cut into fine rings. Drain the corn. Wash the orange, grate dry, finely grate the peel of 1/2 orange. Wash and quarter nectarines, remove stones and finely dice flesh.
For the vinaigrette, cut the orange in half and squeeze the juice. Mix orange juice, orange zest, vinegar, salt, pepper and sugar well. Fold in 2 tablespoons of oil. Mix spring onions, nectarines, chilli, corn and vinaigrette, let stand for a while.
Clean the salad, wash it and cut in half lengthwise. Cut fish into 8 slices. Cut the skin side thinly with a knife. Season with salt and pepper. Heat 2 tablespoons of oil in a large frying pan and fry the fish on each side for about 2 minutes. Season with salt and pepper.
Put 2-3 tablespoons of oil in a large frying pan, fry the salad on each side for about 1 minute. Season with salt and pepper. Arrange the fried salad, 2 fish slices and some salsa on plates. Garnish with lime wedges.