The beta fish is native to Thailand, while the guppy is native to South America and the Caribbean. Guppy fish breed more quickly, and they are much easier to maintain and Beta fish breed less. Male beta fish are more fierce and aggressive than guppy fish and Betas are slightly larger than guppies.
When the beta fish prepare for reproduction, they dance. The male and female fish spiral around each other in a mating ritual called, 'Nuptial Embrace.' It is said to be quite amusing. Guppy fish, on the other hand, mate rather quickly, and it is unceremonious.