They are not the flashiest wrasse but another option may be a possum wrasse (Wetmorella sp.). They can be brownish or a deep red/orange. Cool little boogers, we have 3. They stay pretty small and add virtually no load and bother nothing...but they are a bit hard to find. I have never seen it documented that they eat flatworms but personally I believe they do.
Their faces actually look like a possum and believe it or not, they play dead when you catch them and have them in a bucket (float upside down).
Love mystery wrasses also...but lost ours recently (my favorite fish). All I have left is my avatar.
