No need to wrap an FSCB around the fuselage, as there is no fuel in it.
The FSCB is to maintain a permieter for leaking fuel. The drape over the front is to allow better access to the cockpit area, but the drape will also create a small gap or two from which fuel can more easily leak through.
The fuel was on the surface of the water. The containment boom looks positioned to keep the fuel contained around the plane but to also keep clear access to the cockpit from the outside.