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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 ...
Betta splendens, Siamese fighting fish (2018 [59]) Helostoma temminkii, Kissing gourami (2020 [60] [61]) Order Anguilliformes. Anguilla anguilla, European Eel (2012 [62]) Anguilla japonica, Japanese Eel (2022 [63]) Order Beloniformes. Oryzias latipes, medaka (2007 [64]) Order Callionymiformes. Callionymus lyra, common dragonet (2020 [65]) Order ...
Betta albimarginata is a species of betta fish, endemic to the island of Borneo where it is only found in the Indonesian province of Kalimantan Timur. It inhabits the shallows (5 to 10 cm (2.0 to 3.9 in)) of forest streams amongst vegetation and debris along the shores. This species grows to a length of 2.8 cm (1.1 in). [3]
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 common name of B. pugnax, for example, is thus Penang betta. Betta splendens, the Siamese fighting fish, is often referred to simply as a "betta" in the U.S.
Betta smaragdina 'Guitar' is a naturally occurring variety or even subspecies that lives only in the Bueng Khong Long, Bueng Kan province in northeast Thailand (Isan). What makes them differ from the normal B. smaragdina are their guitar like markings on the dorsal and caudal fin.
Betta akarensis, the Akar betta, is a species of gourami endemic to south-east Sarawak, and whose species name akar was so named after where it was originally found in the river Sungai Akar. This species is a mouthbrooder , [ 4 ] and grows to a length of 10 centimetres (3.9 in) SL .
Betta mahachaiensis is a species of bubble-nesting betta native to Thailand, [2] where it occurs naturally near the Gulf of Thailand. It is typically seen in stagnant waters in swamps, pools, and ponds. The species can be found in brackish waters, with salinity levels between 1.1 and 10.6 parts per thousand.
Betta dimidiata is a species of gourami endemic to Kalimantan Barat in Indonesia. It is an inhabitant of swamp forest and forest streams, and can grow to a length of 4.6 cm (1.8 in). [ 2 ]