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Betta splendens other than as an ornamental betta, betta splendes is a type of fighting, especially the old type. according to records this fish has been cultivated since 1970. This fish has a strong endurance but is not supported by sharp teeth and strong scales. On the gill cover there are 2 red vertical lines. The figure of this betta is practically small with a dark body color. The color is a mix of dark red and dark blue and there are no spots on his body. His body movements tend to be aggressive and attack first when fighting.
This text originated from Indonesian which I translated into English.
Resources :
https://id.m.wikipedia.org/wiki/Betta_splendens
@neoxian