The Siamese fighting fish mate in a fashion that is called "nuptial embrace", in which the male and female spiral around each other, around 10-41 eggs are released and fertilized at each embrace, until the female is exhausted of eggs. The male carefully keeps every egg in his bubble nest, making sure none fall to the ground, and repairing the bubble nest as needed. Incubation last 30-40 hours, and the eggs hatch in 3-4 days.
Siamese Fighting Fish (male) | Project Noah
The Siamese fighting fish (), also sometimes colloquially known as the betta, is a species in the family which is popular as an fish. Bettas can be territorial fish and are prone to high levels of aggression towards each other. Two males in close proximity will almost always attack each other, if they do not have the ability to escape this will usually result in the death of one or both of the fish. Female bettas can also become territorial towards each other if they are housed in too small an aquarium. It is typically not recommended to keep male and female bettas together, except temporarily for breeding purposes which should always be undertaken with caution.
Oct 12, 2016 - Red siamese fighting fish (male)
We found the strongest effect of audience presence when the audience is male. Males were most aggressive toward their opponent in the presence of a male audience when neither or only one male had a nest. This result is in general agreement with that of who showed increased biting frequency and decreased latency to bite in the presence of a male audience relative to female or no audience, but contrary to who showed no effect of male audience. Proximity to the male audience appears to have a substantial influence on the aggressive behavior of the contestants. In our study, the male audience was placed at an intermediate distance (9 cm) relative to previous studies (: 12.5 cm; : 7 cm). As the distance between two interacting male Siamese fighting fish increases the interactants become less responsive (), which may account for different responses to the male audience in the two studies. Thus, there appears to be a threshold distance (>9 cm) above which contestants fail to respond to the male audience. Although very little is known about the spacing of male Betta territories in nature, this threshold distance could reflect nearest-neighbor distances or a zone of increased nest defense.
Male Siamese Fighting fish building a nest - YouTube