The Comet Goldfish Standard is as follows:
Depth of body to be approximately 35% of body length.
Caudal fin to be single, deeply forked and with pointed well spread lobes. The leading edge should ideally be 75% of body length.
Dorsal and anal fins single, pectoral and pelvic fins paired and their extremities having a pointed appearance.
At least 25% of the body to be blue in calico fish.
Minimum body length to be 7.5 cm (3 inches).
The fish should be bright and alert. The body should be long and slender with a smooth outline. The caudal fin should be long, deeply forked, well spread without drooping or overlapping.
Metallic fish may be self-coloured (red, orange, yellow, blue, brown or black) or variegated (any combination of red, orange, yellow, blue, brown, black and white) in a pleasing pattern similar on each side. Quality fish will have high colour intensity and metallic shine extending into the fins.
Calico fish should have a blue background with patches of violet, red, orange, yellow, brown and white, spotted with black. Quality fish should have a high intensity of colour evenly distributed over the body, with colour, especially black, extending into the fins.