18ct gold, diamond and onyx necklace, Carrera y Carrera, centring an articulated fish skeleton, the bones embellished with brilliant-cut and baguette diamonds, the head and tail decorated with black onyx, the eye accented with a collet-set brilliant-cut diamond, completed by a trace chain, circumference approximately 470 mm, signed Carrera y Carrera, maker's mark, numbered 314349.