V E I L T A I L

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

GOLDFISH

/ˈɡəʊldfɪʃ/

(Carassius auratus)

is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish.

The veiltail has a modified deep-and-round ryukin-shaped body, though without the dorsal 'hump' characteristic of ryukins. 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.

It also has a high, prominent and well-developed dorsal fin. The anal fins are paired and are quite well developed as well. 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. Veiltails are available in many colors and may have either metallic or nacreous scales. They can grow from 8 to 12 inches (20 to 30 cm). They are not good swimmers but can be kept with other fancy goldfish. Veiltails will not accept temperatures below 55 °F (13 °C).

📷Take with Canon D1200 dslr 

Source from 

https://en.wikipedia.org/wiki/Goldfish

https://en.wikipedia.org/wiki/Veiltail