What eats ghost flatworms?

[gmcsonoma94]

I have a 32 Biocube. Currently it has a fire fish and a royal gamma for fish. I am noticing a decent population of ghost flatworms so I was looking for some suggestions on anything that would snack on them. I’m looking for suggestions that won’t harass the other two fish. Right now I’m looking at the azure damsel.

 

[1000rrstunna]

Yellow coris wrasse or the springeri damsel I believe will work. Possibly a 6 line but they can be mean