It looks like a torpedo, but it is a couch is made of a ca 1950 Grumman Albatross float tank:
Donovan Fell III, here together with another Don from the MotoArt team, founded MotoArt as a hobby, now a 6 member team, to give airplane parts a new life.
Inhabitat pointed me to MotoArt, (@MotoArt Studios on Twitter)