platinum arowanas because there super rare
Halfmoon
Yes, Betta Fish are extremely aggressive and they will most likely kill your other fish.
yes, currently most of all the betta fish come from china. they are found in little ponds with other betta's.
Yes they would be fine (if they are plants that are ment to live underwater) for the betta splenden aka Siamese fighter fish (assuming that is the betta you are refering to) as it is a tropical fish
yes the most popular fish :)
sleep
Most fish get along well. However, do NOT mix betta fish with other fish. Not even another betta. You have to have a permit to have to betta fish in the same tank with eachother. Betta fish are only mixed to mate. Bettas are not born in the egg. They come out as a very small fish. After the betta babies have come out, all of the fish are seperated. Even the parents, if the betta babies are left in the tank with the others the betta parents are very likely to eat the others.
Some are, most are not.
other Betta fish and the bigger fish.
Betta fish do not eat fish.
No betta fish are carnivores.
Male Betta splendens fight with other male Betta splendens so the answer is most other fish will not fight with a Betta in the same tank. To try to list every species of fish here would be impossible.