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Siamese fighting fish (B. splendens) are frequently sold in the United States simply as "bettas". As of 2017, around 73 species are classified within the genus Betta. [1] A useful distinction is that, while the generic name Betta is italicized and capitalized, when used as a common name it is usually neither italicized nor capitalized. [5]
There is evidence that the genetic basis for aggression in betta fish is not exclusively sex-linked – a 2019 study found that female bettas of the fighting strain show significantly higher levels of aggression than their female wild-type counterparts, despite the fact that historically only male bettas have been used in fights and thus ...
Male individuals of the species are distinguished from species such as Betta splendens by iridescent green-blue stripes on a brown-black background. [ 2 ] As labyrinth fish, Betta mahachaiensis have a pair of suprabranchial chambers that each house an air-breathing organ known as the labyrinth organ , a complex bony structure lined with thin ...
Male and female individuals of Betta imbellis can live together outside of breeding season, as well as getting together for breeding. Males will build a bubble nest before breeding. After mating, the male catches the falling eggs and places them in his bubble nest. In 1–2 days, the eggs hatch and continue to absorb their yolk sack for 2 days.
The male is the caretaker, holding the fry in his mouth for up to three weeks. In captivity, these fish are very easy to breed. During spawning, which can take several hours, the male embraces the female. Fertilized eggs are gathered into the male's mouth and he retreats to brood the fry when spawning is complete.
Male individuals of Betta smaragdina will build a bubble nest before breeding. The temperature at which breeding typically occurs is 25.6 to 26.7 °C (78.1 to 80.1 °F). Males and females can live together and the male and female should already live together for breedi
The Krabi mouth-brooding betta probably feeds on insects, crustaceans, other small invertebrates and zooplankton. This fish is a paternal mouth brooder; the male fish takes the fertilised eggs into his mouth and keeps them there until they hatch. [3]
Betta akarensis is a paternal mouthbrooder.The female plays the more active role in initiating courtship and defending the area against intruders. After courting, eggs and milt are released during an ’embrace’ typical of anabantoids in which the male wraps his body around the female.