Koi (鯉) or more specifically nishikigoi (錦鯉 - literally "brocaded carp"), are colored varieties of the Amur carp that are kept for decorative purposes in outdoor koi ponds or water gardens. In most Japanese cultures, koi represent a material and spiritual abundance or advancement. Feng shui, a spiritual form of organization and placement of objects, says that having the spirit of the koi near you will attract good luck, fortune, and spiritual benefits.
Each koi has a particular significance in Japanese culture based on its color:
Gold Koi: Wealth, prosperity, growth.
Kohaku: This common color pairing, red and white, represent career success. It can also mean love and compassion.
Ogon: The platinum koi signifies business success and material wealth in career.
Ochiba: This unique blue and yellow koi represents the change of seasons and transition.
Butterfly koi: This flowing koi signals elegance, beauty, and harmony.