I have a Beta fish. They are small and colorful freshwater fish.
Are they more colorful than an Alfa fish?
I am not sure about Alfa fish. Beta are small but vary in size.
It was a joke. I do not think an Alfa fish exists. Are the Beta fish the ones that fight if they are put together?
Oh, your joke would make sense if you spelled it ALPHA.  Now I understand. Beta can live in low-oxygen conditions.
Oh yes, how silly of me. Do Beta fish change colors for various reasons?
I do not know. But they do live in rice paddies, ditches and large puddles.
Interesting. Someone once told me that they create bubble nests, is that true?
as "B. picta". The mouthbrooding species are sometimes called "pseudo bettas", and are sometimes speculated to have evolved from the nest-builders in an adaptation to their fast-moving stream habitats.
A phylogenetic study published in 2004 concluded tentatively that bubble-nesting was the ancestral condition in "Betta", and that mouthbrooding has evolved on more than one occasion in the history of the genus. However it was unable to establish a correlation with any of three habitat variables studied: whether a species was found
from small whales; stating, "I am aware that down to the present time, the fish styled Lamatins and Dugongs (Pig-fish and Sow-fish of the Coffins of Nantucket) are included by many naturalists among the whales. But as these pig-fish are a noisy, contemptible set, mostly lurking in the mouths of rivers, and feeding on wet hay, and especially as they do not spout, I deny their credentials as whales; and have presented them with their passports to quit the Kingdom of