Make the farofa if desired: Melt butter in a skillet or shallow saucepan on medium heat. Add sliced onion, and cook, stirring, until it turns light brown. Stir in manioc and cook, stirring, 5 to 8 minutes, until it starts to toast. Cover and keep warm.

Make the fish broth: Cut each bass fillet in 4 or 5 pieces, cover and refrigerate. Place trimmings in a 3-quart stovetop casserole, preferably an earthenware pot. Lightly salt shrimp, cover and refrigerate. Place shells in the pot. Add 5 cups water; the bay leaves; the turnip; 2 onions, chopped; 2 tomatoes, chopped; half the shishito peppers; the garlic; and half the cilantro and chives. Bring to a boil, reduce heat and simmer about 45 minutes, until vegetables are tender.

Heat oven to 450 degrees. Cut a slit in the skin of the plantain, wrap in foil and bake 20 minutes, until flesh is tender. Cool.

Strain broth into a bowl, pressing on the solids. Discard solids and return broth to pot. Cook over medium heat until reduced to 1 1/2 cups.

Slice remaining tomatoes and remaining onion 1/4 inch thick and add to pot. Add bell peppers, Cubanelle peppers, remaining shishito peppers, remaining chives and all but 1 tablespoon remaining cilantro. Bring to a simmer and cook about 20 minutes, until vegetables are tender.

Peel plantain and slice it 1/2 inch thick. Add to pot. Add coconut milk and dende oil. Add fish and octopus, if using, and simmer 5 minutes. Rinse and dry shrimp and squid, if using, and add to pot. Simmer 3 minutes. Check seasonings. Strew remaining cilantro on top, garnish with a red chile and serve over rice directly from the pot, with farofa and piri-piri on the side.