If it's true that Beta fish are fighting fish and can't put them into same tank because they will kill each other. Then how come they don't kill each other all off in the wild and become extinct?

If it's true that Beta fish are fighting fish and can't put them into same tank because they will kill each other. Then how come they don't kill each other all off in the wild and become extinct?
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1 Answer

Answer :

Yes it’s true. Though they don’t actually fight (expect for maybe a little biting), they psych each other out till one dies. They are territorial. If a beta goes into another area they’ll “fight”. The have small territories though, it’s not like the pond is gonna fishes whole territory but a little tank isn’t going to be enough space for two.
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