What is a goldfish with three tails and four tails?

The three tails are not separated, but are connected together in the middle of the fish tail to form a tail like a mountain; The four tails are separated in the middle of the fish tail to form a four-piece tail.

Goldfish have single tail, double tail, single tail and double tail (3 tails), vertical tail, spread tail, fan tail, butterfly tail spread fin and upturned, long tail, middle tail, short tail and residual tail.

There are also many changes in the color of the caudal fin, some of which are consistent with the body color; Some have red bodies and white tail fins; Some varieties of red tail fins have white edges, while others have black edges; Some kinds of caudal fins have spots of different colors.

Extended data:

Goldfish belongs to the same species as crucian carp in taxonomy. Compared with crucian carp, goldfish has great variation in external morphology, but the whole fish body can be divided into three parts: head, trunk and tail.

The front end of the head is the mouth, and the back is the nose, eyes and gill cover. Some species have sarcoma on the top of the head, some species have villous balls above the nose, some species have prominent eyes, and some species have blisters upward, and some species have gill cover leakage to form gill turnover. The trunk of goldfish is covered with scales, mainly including normal scales, transparent scales and pearl scales.

There is a lateral line on its side, and the scales on the lateral line, the scales under the lateral line and the scales on the lateral line are different in different varieties of goldfish. Typical goldfish have pectoral fins, ventral fins, anal fins, dorsal fins and caudal fins, but some species have no dorsal fins or anal fins. The tail of goldfish consists of a tail handle and a tail fin, and the tail fin has various shapes.