The veiltail is a type of goldfish known for its extra-long, flowing double tail and high sail-like dorsal fin.

The hallmark of the breed is its lengthy and graceful double tail which is square-edged and without any forking or indentation between the lobes.

The term 'veiltail' is commonly and erroneously applied to any goldfish displaying a long caudal, but true veiltails must have all the characteristics described above.

[3] The veiltail, a name coined by William T. Innes, originated in the United States in the 1890s when Franklin Barrett of Philadelphia crossed a Japanese-bred fringetail ryukin to a telescope eye goldfish that exhibited a short, square-edged caudal.

According to William Seale[4] this fringetail was one of many imported by the Wisconsin State Fish Commission for the World's Fair.