Combine sea bass fillets, lime juice, salt, and pepper in a large bowl. Marinate in the refrigerator for 30 minutes.
Heat palm oil in a large skillet over medium heat. Add tomatoes, onion, green bell pepper, red bell pepper, cilantro, green onions, parsley, and garlic; cook and stir until fragrant, about 2 minutes. Add marinated sea bass and coconut milk. Reduce heat to low; cook for 12 minutes. Add shrimp. Continue cooking until sea bass flakes easily with a fork and shrimp is opaque, about 3 minutes more.