TheRock wrote:

The only other solution to aggressive fish is either, another fish of equal
or larger size
or a more aggressive fish.

I've not had a lot of luck with this approach. I've had two fish that seemed to
target any new arrivals; an Emperor Angle and a Powder-blue Tang. Neither would
tangle with a Lionfish, but anything else was fair game. Size and temperament of
the new fish didn't matter; they had to sleep sometime, and the aggressor would
get them sooner or later.

Trap the wrasse out.

George Patterson
No one ever says "It's only a game." when his team is winning.