When I get the sea bass I tend to keep it fairly simple With asparagus coming into season timing is ideal and hopefully you have fillets here and not the whole fish.
Lightly blanch some asparagus and set aside (use an ice plunge to keep the colour and stop the cooking if you wish).
Slash the skin of the fish a few times on the diagonal then dust this side with plain flour.
Get the pan REALLY hot and cook the skin side first (crisps the skin) then turn the heat down a bit, add a knob of butter and flip the fish to cook the other side gently for a few mins.
Remove to a warm plate to rest for the two or three minutes.
Whilst the fish is resting turn the heat back up in the pan and warm/toss the asparagus in the juices.
Put the asparagus on the plates neatly side by side (5 or six bits per person laid out like logs or planks) then place the fish across on the diagonal.
So simple and so good.
I usually put some sliced lemon and dill inside with a bit of salt & pepper, then the same on the outside, wrap it in foil and bake for 20 to 25 mins.
I also had some at a restaurant in London once and it was baked in Pernod. Was a bit strong but still very nice. I would have just put a slosh of Pernod in myself rather than a whole cup full.