Pat the skin of the sea bass dry with a clean towel. In a bowl, combine half the Harissa with the spices, lemon zest, juice, olive oil, and salt and pepper to taste. Rub the sea bass fillets with the marinade until their evenly covered, then set aside for at least 20 minutes.
Heat a large frying pan over medium-high heat. Lay the sea bass fillets skin down and cook for 3 minutes before carefully turning them over and cooking for 2 minutes.
Remove the sea bass from the pan and keep warm.
Gently soften the onions in the same pan, then add the garlic. Cook for 1 minute.
Add the honey, remaining Harissa, and a splash of water. Reduce the mix for 2-3 minutes until it thickens and coats the back of a spoon.
Finish with lemons, chopped herbs, and rose petals.