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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 ...
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]
The peaceful betta or crescent betta (Betta imbellis) is a species of gourami native to Southeast Asia. Betta imbellis has a pair of suprabranchial chambers that each house a labyrinth organ , a complex bony structure lined with thin, highly vascularised respiratory epithelium .
Betta patoti, sometimes known as the tiger betta or zebra betta, [1] [2] is a species of gourami. It is a freshwater fish native to Asia, where it occurs in the southern part of East Kalimantan on the island of Borneo in Indonesia. The species reaches 10.7 cm (4.2 inches) in total length and is known to be a facultative air-breather. [3]
Betta unimaculata, the Howong betta, is a species of labyrinth fish endemic to the island of Borneo where it is only known from the eastern portion of the island. This species grows to a length of 12.6 centimetres (5.0 in) TL, one of the largest known species of Betta. This species is also found in the aquarium trade. [2]
The spotfin betta or Brunei beauty [1] (Betta macrostoma) is a species of labyrinth fish endemic to the island of Borneo.It generally inhabits pools of very slow-moving water along rivers and streams in very shallow waters of 30 cm (12 in) or less.
The Toba betta (Betta rubra) is a species of gourami endemic to Sumatra, Indonesia where it is an inhabitant of peat swamps. The species grows to a length of 5 centimetres (2.0 in) TL , and it can also be found in the aquarium trade.
The spotted betta or Java fighting fish (Betta picta) is a species of gourami endemic to Indonesia where it inhabits relatively cool, 22‒25 °C (72‒75 °F), highland streams of Java. [ 2 ] [ 3 ] [ 4 ] In 1967, D. S. Johnson reported the species to be common in blackwaters of southern Malaya .