Male bettas blow a cluster of bubbles that float on the surface of the water.
They look just like Big betta fish, but smaller.
If you would like to know what gender your betta is, look for the egg spot. (for females) It should be a small white cloud between the head and body. If your betta has one, it's a female. If your betta doesn't have one, it's a male.
the Betta or Siamese fighting fish
It can not be mistaken for anything else. It is a tiny bubble at the surface of the water but it will not be a single bubble for more than a minute or two. The male Betta builds his nest quite rapidly.
a fat betta fish
The male Betta builds a bubble nest at the surface of the water. The ova(eggs) are fertilised under the nest then collected by the male in his mouth as they sink. He then places them in the nest where he tends them.
the male betta fish makes the nest.
it looks like they have a big bubble in their side
It looks like a squirrels nest.
they can. but it is VERY rare. usually you would see a bubble nest.
A Betta breaths air the same as we do, however wnen a male betta builds a nest the water temp is or will be close to 80 degrees and he will tend to the nest for only a short time, if a female betta is not placed into the tank when you see the nest he will give up on the nest and the nest bubbles will dissovle until the same time the next day or the water temp is close or above 80 degrees, an eaiser way to find out if the bubbles are for the nest or from the stone, is to unplug the air stone. A betta in a 1 gallon container in my opinion with a air stone will not build a nest the male prefers a calm water and a warm water to build a nest.
Actually, with bettas it's the male that cared for the bubble nest rather than the female. You should leave the male with the nest and separate the female.