Recently, the popularity of koi betta in Japan, which has continued for several years, has begun to slow down a bit. As a result, even in shops in Bangkok, the home of betta fish, you no longer see only Koi bettas on display like before. Currently, only carefully selected individuals of Koi Beta are displayed in stores. In addition, even though it was difficult to obtain good specimens of giant Japanese koi betta, it has become possible to obtain very good specimens at reasonable prices. Although it is a small number, I occasionally see giant half-moon bettas, but it is hard to say that they are in their complete form. The W-tailed individuals that I occasionally saw during the Koi betta boom have now become relatively easy to obtain, probably because they have started to be mass-produced. Previously, it was several times more expensive than regular Koi betta and difficult to obtain. In this way, the Koi betta market has changed significantly.

So, this time I would like to introduce the double tail of Koi betta, which I have not introduced yet. In the past, they were expensive and it was difficult to photograph individuals worthy of introduction, but these days they can be obtained for the same price as regular Koi bettas.

This time I was at the farm and had the opportunity to select an individual to photograph, but there were a few things that caught my attention. The reason is that there are few individuals with the usual red and black color pattern of Koi betta. There are overwhelmingly many yellow and orange individuals called tigers. It wasn't just the male in the bottle, it was the female as well. I was allowed to put a net in the farm's female breeding pond, and there too there were a large number of yellow-colored individuals. This may be because the red and black colors are so popular that they were shipped first. It may also be because yellowish individuals were used as parent fish during breeding. I forgot to ask about it this time, but I'd like to ask about it next time I go to the farm.

Another thing I noticed is that there are many individuals with short bodies. Is the W tail itself some kind of malformation? Since it is a breed bred from , there is probably a high probability of vertebral bone abnormalities. Short-bodied Betta fish have been on the market from time to time, but they were not fixed at the breed level and were often one-of-a-kind items that were born by chance. Personally, I don't really like short-bodied fish, so I didn't bother to introduce them here. Personal likes and dislikes aside, short fish with neatly shaped and cute bodies seem to be popular in the Japanese market. There are relatively many cute semi-short individuals of this Koi betta W tail, so it should be easy to obtain them.

The same goes for bettas other than carp bettas, but there are some important points when choosing a double-tailed betta. One is that the tail fin, which is divided into two, is of equal size at the top and bottom. There are surprisingly many individuals with poor balance, so be careful. Second, there is no depression in the front of the dorsal fin, and it is a gentle line from the head to the back. If something goes wrong here, the charm of the large dorsal fin will be ruined.

The double tail of Koi betta used to be expensive, but as the price has stabilized, there are more opportunities to introduce it to Japan. It seems that there will be more opportunities to raise them, so I would like them to enjoy raising them with breeding in mind.