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The Lionchu or lionhead-ranchu (Thai: สิงห์ลูกผสม) is a variety of goldfish that has resulted from crossbreeding lionheads and ranchus. [ 1 ] [ 2 ] Description
Japanese, Thai, American, and British ranchu breeders, as well as many goldfish societies, adhere to two strict viewing classifications, namely the top-view ranchū comportment and the side-view selection criteria.
Lionhead goldfish were bred to mimick the appearance of this mythological Asian animal. Lionheads were bred in China to depict the image of the mythical Chinese lion-dog (the shishi, in Japanese legend). [2] They were introduced to Japan from China during the 17th and 18th centuries.
The oranda is a breed of goldfish characterized by a prominent bubble-like "hood" on the head. The headgrowth or hood (also known as a "wen" or "crown") may be a prominent growth on the top of the head (cranial region) or may encase the entire face except the mouth.
Ranchu with telescope eyes, 1910. Except for its enlarged projecting eyes, the demekin is similar to the ryukin and fantail . It has a deep body and long flowing fins, some with veiled fins and some with broad, or short fins, like the "China doll".
Like ranchu, the bubble eye goldfish lacks a dorsal fin and has a double tail. [4] They normally grow up to 3 to 4 inches in length. If one of their "Bubbles" pop due to pressure or collision with a sharp object, there is a risk of infection where the inside of the sac has been exposed.
Although calico coloration occurs in many fancy goldfish varieties such as telescope eyes, fantails, ryukins, orandas, and ranchu's, the nacreous scale characteristic is usually exclusive to the shubunkins, which are single-tailed fish that are similar to the common goldfish and could grow up to 12 inches in length. [2] [3] Calico Ryukin goldfish
The pompom has a similar body shape and finnage to the lionhead or Oranda but instead of supporting a headgrowth it has nasal outgrowths. The extent of the nasal outgrowths, which are enlargements of the nasal septum, vary in pompom goldfish.