Answer:
What kind of band never plays music?
I am a caribbean shape that makes ships disappear
I am a person who pretends to be someone else
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls
I am owned by every man, though my length differs. Their wives use me after getting married. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.