Around the same time a German breeder, Dr. Eduard Schmidt-Focke, bred the first deltatail betta. A betta with a symmetrical triangular tail shape. In 1967 in America the IBC (International Betta Congres) was founded. The IBC had the goal to breed Betta splendens with broad symmetrical fins instead of long. This resulted in fish with a better swim capacity. But still it took a long time before the other now so familiar tailtypes were developed. In 1980 some wellknown American betta breeders, like Peter Göettner and Paris Jones, developed the superdelta tailtype which were bettas with enormous fins. In 1984, the Frenchman Guy Delaval imported offspring of these fishes to France. Delaval selected and bred these to obtain a bigger angle of the caudal. In 1987 he succeeded to breed fishes with a 180 degrees angle. Rajiv Massilamoni realized that Deleval did what was thought to be impossible. Till that time most Betta splendens were asymmetrical deltas or superdeltas with a maximal spread of 160 degrees. Laurent Chenot and Rajiv Massilamoni started to cooperate in order to maintain this tailtype. They tried to breed these fishes but they were to much inbred. The male didn't make a nest anymore and didn't know how to wrap himself around the female. After many attempts they with petstore Betta splendens and different lines, Chenot and Massilamoni eventually succeeded to breed a fish which had a mother from Delaval and the father was a melano doubletail male from a American line. This fish was called R39, and was coupled to all the females in the lines of Chenot and Massilamoni. Again some fish showed up with the 180 degree spread. In 1991 the American betta breeder, Jeff Wilson saw these fishes an he called them "halfmoons". He started cooperating with Chenot and Massilamoni and the inbreeding of the American line led more frequent halfmoon appearance in the offspring. In 1993, Chenot, Massilamoni and Wilson showed on of their halfmoon fishes at the IBC show in Tampa Florida under the name CHENMASWIL. They won the "Best of show". This was the start of a true halfmoon fever.
Laos and Cambodia, it is thought to have originated from Thailand.
If you would like to keep bettas as pets, you need to keep in mind that originally bettas comes from a tropical climate. To keep them healthy, the conditions from their natural environment need to be replicated. Water temperatures of 75 to 85 degrees Fahrenheit will keep bettas comfortable and help to reduce the chances of getting parasites. With an active filtration system, make sure the water doesn’t move too fast. Bettas are accustomed to slow moving water. If there are strong currents, it could stress the fish out.
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Another interesting fact about betta fish is their breathing method. Rather than breathe underwater like a majority of fish, bettas breathe air rather than water using an organ referred to as a labyrinth. That is why you may notice that they go up to the surface once in a while and open their mouth. For this reason, it is a good idea to keep bettas inside an aquarium that isn’t too high.
The frequent trips that they take to the surface of the water requires a lot of energy. It can stress them out and they may become weak and more susceptible to diseases. So although certain aquarium design might be quite appealing to you, when they are very tall, they aren’t the best choice to use with bettas.
Betta Fish Facts - 10 Facts you probably never knew - Betta Answers