Hitchhiker worm found cruising ID please

[Bigred]

Here the pictures.

 

[LeslieH]

It's a nemertean (ribbon worm) and an unusual one to find in a reef tank. I haven't seen any images of similar ones posted probably because they're rarer than the other types and normally live on soft bottoms. There's an excellent write up about nemerteans in RC's Reefkeeping magazine http://www.reefkeeping.com/issues/2004-01/rs/index.php

Incidentally, it's always better to take pictures of UW critters in a shallow dish of water.