Place tomatoes in a wide pot with a tight-fitting lid. Add EVOO, 3 turns of pan, garlic, fennel and onion, scattering the veggies around the pan in a thin layer. Add chili, parsley, salt, pepper and water. Bring to a boil, reduce heat to a rolling simmer and cover. Simmer 45 minutes, uncover and reduce by half, 10-15 minutes. Add fish, skin-side up, and cook 2-3 minutes. Flip, season fish with salt and pepper, and cook 5 minutes more.
Rub charred bread with garlic, drizzle with EVOO and season with sea salt. Place bread in a bowl and top with a piece of fish and some sauce.