I would leave it. Doesn't look gone.
When it starts to thin into skin and disinegrate then remove it.
If bothers you the way it looks remove it. The other one will grow.
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I would leave it. Doesn't look gone.
I vote for Berghia, get at least two.I have been considering Berghia nudibranchs for a few months, though my Nero 5 looks like it could make quick work of them . Maybe I should try a Peppermint shrimp instead (no corals for it to potentially consume in my build). Love its looks!
I'd probably just leave it. I doubt a piece that size will cloud the tank. Besides, it looks mainly like a macro tank anyway. You may not mind a little more Caulerpa. Either way, you're going to end up having to thin the heard eventually as it spreads.