I have no experience with wrasse or anything eating vermetids. However, I do have experience with cutting them out with utility razor blades and ic superglue. The razor blade is more difficult and hit or miss. I don't know if I accidentally cut into the worm or completely removed them. If it's clean and completely removed, problem solved. If you leave a little or cut into their flesh, they respawning and even spread elsewhere if the flow picks them up.
Ic superglue is best. Just a drop over their opening and they starve out in a couple weeks. I've done this personally and it works. They starve and the tube bleaches out. Your corals will grow right over them and hide the unsightly glue.
It is never a good idea to leave them be. They multiply exponentially when they bloom. They also spit a slimy web that they use to feed which, not only irritates coral, but it also coats the coral preventing removal of waste and absorbing nutrients. The process isn't immediate, but it will stunt your coral growth and possibly kill it. Melev's reef did an article where he let it be and it ultimately wiped his 400 gallon. For what it's worth, that's enough to convince me to spend on some ic superglue on the little buggers.
Ic superglue is best. Just a drop over their opening and they starve out in a couple weeks. I've done this personally and it works. They starve and the tube bleaches out. Your corals will grow right over them and hide the unsightly glue.
It is never a good idea to leave them be. They multiply exponentially when they bloom. They also spit a slimy web that they use to feed which, not only irritates coral, but it also coats the coral preventing removal of waste and absorbing nutrients. The process isn't immediate, but it will stunt your coral growth and possibly kill it. Melev's reef did an article where he let it be and it ultimately wiped his 400 gallon. For what it's worth, that's enough to convince me to spend on some ic superglue on the little buggers.