Help me out here.

[tim the toolman]

Vermetid Snail
Image: Classification: Comments: Status:
Vermetidae This group of snails have forgone their mobility by attaching their "shell" to the substrate and converting it into a calcerous tube. They release a mucus web out into the water, which they then reel back in and consume, eating the food particles caught in it. Their presence is a sign of a healthy system and don't typically cause any problems. The exception is if the mucus net irritates a neighbouring coral, which can lead to death of the polyps that it is irritating.
Fromhttp://www.masa.asn.au/masawiki/index.php/Hitchhikers_Guide_to_the_Reef_Tank

[reefwars]

A six line wont touch them , there is however a wrasse that is supposed to can't remember the name.