Ornamental pond fish are popular additions to many gardens and outdoor spaces. CARP (4 letters) is a species of fish that is native to Europe and Asia, and is known for its hardiness and adaptability. Orfe (4 letters) is a species of fish that is native to Europe and is known for its bright colors and long fins. KOI (3 letters) is a species of fish that is native to Japan and is known for its vibrant colors and patterns. All three of these species are popular choices for ornamental ponds, and can add beauty and life to any outdoor space.