A Lunar wrasse needs a minimum of a 70g tank. They will grow up to 10" long.
Do you have a DSB
? They need a soft sand substrate to sleep in.
I agree with Reefrunner - you are already well overstocked for the size tank you have; a Lunar Wrasse would put at the capacity of ~ a 120g tank.
Ive seen a guy put 35 fish in a 55gal marine aquarium and he's had it running for quite awhile.
I'd definitely like to see that. Honestly though, "unlimited supplies" has nothing to do with the fact that marine fish are extremely territorial, and even the suggested "1" of fully grown fish per 5g of tank space" is a very cramped recommendation in comparison to how these fish live in the wild. To further reduce their "space" and swimming/grazing room is nothing short of sending out a personal invitation for disease, stress, fighting, and subsequent tank crashes.