Wrasse in a 21 gallon?

[esshoes]

Hello,

I'm hoping for some confirmation on whether or not it's feasible to add any sort of reef-safe wrasse to a 21 gallon (20x20x12) tank with 1 other fish (mandarin). I did this once in the past with a small clown fairy wrasse, and he thrived for months with no issues that I could see, but I know the general rule says not to put a wrasse in a tank so small. If I get one small, can I keep it in there until I notice it has issues due to tank size restrictions? Ideally I'd like to get another clown fairy wrasse, but I'd love to hear if anyone knows of a reef-safe wrasse that would thrive in such a small tank.


Thanks,

Ben

https://c1.staticflickr.com/9/8387/8508803612_731984a244_b.jpg

[evolved]

The only species suitable of those of the Wetmorella genus or Pseudocheilinops ataenia.

[MMacro]

The only species suitable of those of the Wetmorella genus or Pseudocheilinops ataenia.

+1
Any of the Cirrhilabrus or Paracheilinus species will get too big.
The Wetmorellas and ataenias are a lot of fun to watch and fairly easy to keep.

[esshoes]

Thank you both for the detailed answers. I will resist the urge and choose one of those you mentioned if I go with a wrasse