How can I tell the difference between male and female beta fish?
The male beta is the one with longer flowing fins which he flares in the presence of most other fish. The male also has a longer and larger overall body The female is usually smaller in size then the male and much less aggressive. As well, all female beta fish have a small white dot on their stomach directly behind their ventral fins, or the shorter fins on their stomachs. Q: What is a bubble nest? A: Male beta fish will often build bubble nests when they are happy or content. These may look like large masses of floating bobbles at the top of the tank. This is nothing to worry about and is perfectly normal. Betas take in surface air and move over under his nest and place a single bubble. After many, many bubbles, they can create a large, thick nest. However the real reason a male beta fish will build a bubble nest is to harbor and protect the female beta fishes eggs. the male will carry each egg up into the bubble nest and place it in very carefully.
