6 years later. . .
I've got white ones and green marbled ones. Pretty sure the green marbled ones eat Zoas.
Just got a Harlequin and relocated my Flame Hawkfish.
Thinking Either the hawk or a CBB that's no longer in that tank ate 2 LG skunk cleaners. (could have been yellow tang maybe? It was seen "trimming" the cleaner shrimps antennas. Ended up an inch long before I noticed both missing later. )
Hope it wasn't the yellow tang and the Harlequin will be fine. Only an inch long.
Fire Shrimp is still there so?
Time will tell but for now...
Roll those dice!