1. Plural of koi; ornamental carp fish, typically colorful, kept in ponds or aquariums.
Usage: Usually used as a plural or mass noun; 'koi' can also serve as both singular and plural.

Examples

• The garden pond was filled with beautiful kois in shades of orange, white, and black.
• She feeds her kois every morning at the same time.
• Kois can live for decades if properly cared for.
• The aquarium displayed several prize-winning kois from Japan.
• Many people enjoy watching kois swim gracefully through the water.