I bought a male and female betta about a week ago. I kept the male in a small tank with the female place inside a separate glass container. Last night I placed the cover over the tank wake up this morning to feed them and discovered that she had jumped out of the container, male had built a bubble nest and discovered that they spawned during the course of the night or morning. I removed her and placed her back inside the container and lowered her water leave. Male is quite is constantly rotating the eggs inside the bubble nest.
I was quite surprise that the female had spawned as she look extremely young. I have breeding tanganyikan cichlids for 3 years and decided to make a change.