Well so far so good with the cuc,they still intact and seem ok ,
Not all wrasse are viscous to cuc members it depends on the temperament of the individual wrasse itself,
I was told and done quite a bit of looking that Doug (my melanurus wrasse ) might be a problem with the snails and the hermit , it was a case of trial and error to see if he would pester and eat them also Percy (pearlscale butterfly fish ) might be tempted to,
Seems so far I've been lucky all seems to be good in the tank so will leave it another week and if still ok probably get another couple of snails and another hermit ,then wait see what happens.
Don't want to push it to far into temptation if that's ok after that then I'll leave it like that.
I did find out that if you don't mix the snails and stick to the same species they less likely to create a problem and get eaten ,
Point to remember if that's true but start one or two at a time .
Slow and patient is the key I think , as with most of the marine hobby ,