Nonn from siamensis visited my forum a while back when we were having this same discussion and had a few words to say on the subject from a thai perspective:
"Hello,
Hybrid -more technical term than crossbreed- will not only ruin the pure wild blood but will ruin good intention of some people who would like to keep pure breed but happened to acquired a hybrid with out knowing it is a hybrid.
For the situation in there natural habitat, I will conclude like this.
B. smaragdina distribution range is very wide and it is unlikely to cross breed with other Thai's Betta species, so I guess they will be fine even in a long run. DNA analysis also show that they are very distinct from other Thai's species.
B. splendens distribution range is quite large also. In general the species -pure wild form- will survive in there micro habitat, like a pond in a golf course, but many distinct local strain will be lost and has been lost from many area.
B. imbellis, the hybrid fighting form will ruin a lot of pure bred in many habitat but like B. splendens, they will survive in their own micro habitat. In the long run, my concern is inbreeding that will make the population weaker and weaker. You would imagine that in the past flooding occur every year and the fish get to exchange their gene pool amoung population but good irregation system we have will prohibit that, top up with fewer fish in each habitat, it will be disaster recipe.
B. sp. Mahachai, I'm one of the person who 100% sure that this is a pure distinct species of Betta (more on that later), but for those who doesn't, this is a VERY BEAUTIFUL distinct strain of Betta that deserve conservation anyway. Their distribution range is very limited, in man disturb area. If no further conservation action is taken place soon, we will lost this species in nature altogether with in a few years.
And once the population in the wild has gone, we will be left with pure bred Mahachai and X breed mahachai which is very difficult to separate visually. If someone happen to thing a xbreed is a pure breed, breeding and distributing it as pure breed, then it will eventually ruin the whole population."
Nonn@siamensis.org
to respend to you teelie, my problem is the fact that the people outside of thailand who think to x these species will end up selling them as something they are not and perpetuating a false species.
there are so many fun ways to experiment with just splendens as it is that it's a shame that some people can't see the beauty of the pure form.
a thai member commented that the hybrid x is like a lady with makeup on but the pure blood is the classic beauty worth searching for.
