In Feng Shui folklore the turtle is regarded as a most auspicious and celestial creature that brings great good fortune.
Everyone benefits from the symbolic presence of the turtle, which is the symbol of longevity. The turtle is the guardian of the North, which governs career luck!
If you have a large enough office, one of the best Feng Shui is to keep a single turtle (terrapin, tortoise) in the North corner of your office. One will do. The number of the North is 1, and a single terrapin is more auspicious than a pair.