The Redcap Goldfish Standard is as follows:
Depth of body to be approximately 65% of body length.
Caudal fin to be divided, well spread and held below the horizontal with the trailing edge having no apparent fork or pointed lobes; minimum length of caudal fin should ideally be 75% of body length.
Dorsal fin to be single, all other fins to be paired with their extremities having a pointed appearance.
Cranial region (cap) to be red and well developed.
Minimum length of body to be 5.5 cm (2¼ inches).
Forked tailed fish are allowable but may be downpointed.
The fish should be bright and alert. The body should be short and rounded with a smooth outline. The dorsal fin should be carried high and erect, and the caudal fin well divided and flowing gracefully. The hood should be well developed and in the cranial region only.
The colour should be metallic with deep red on the cap only, and the rest of the body should be white.