Heat oven to 375° F. Butter an 8-inch square baking dish.
Heat the cream in a saucepan over medium heat. Whisk in the cornmeal and cook, stirring, until thickened, about 2 minutes. Stir in the corn, scallions, 1 ¼ teaspoons salt, and ¼ teaspoon pepper.
Remove from heat. Stir in the eggs and spread the mixture in the prepared baking dish. Bake until set and golden brown around the edges, about 35 minutes.
When the bread has 15 minutes left to bake, heat 1 tablespoon of the oil in a skillet over medium heat.
Sprinkle the bass with the Cajun seasoning and cook until opaque and beginning to flake, about 4 minutes per side.
Divide the greens among individual plates and drizzle with the remaining oil. Serve with the bass and spoon bread.