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Betta mahachaiensis Kowasupat, Panijpan, Ruenwongsa & Sriwattanarothai 2012

Diagnostic Description

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Distinguished from other species in the Betta splendens group by the combination of the following characters: opercle with two parallel iridescent green to bluish-green vertical bars; brown-to-black opercular membrane without red streaks or patches; dorsal, caudal, and anal fin rays brown to black contrasting with iridescent green or bluish-green interradial membranes; dorsal fin with at least its proximal two-thirds having transverse black bars; caudal fin without dark transverse bars, small black rounded marks flanking the internal rays on interradial membranes; pelvic fin brown to black with iridescent green/bluish-green front margin and white tip; an iridescent green to bluish-green appearance on the brown-to-black body background; head length 24.9-31.2% SL; postdorsal length 17.1-25.2% SL; length of dorsal fin base 12.2-19.3% SL; pelvic fin length 21.2-49.6%; pectoral fin length 15.4-21.3% SL; and orbit diameter 22.8-29.7% SL (Ref. 92085).
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Morphology

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Dorsal spines (total): 0 - 2; Dorsal soft rays (total): 8 - 11; Anal spines: 3 - 4; Analsoft rays: 22 - 26
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Biology

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Encountered in nipa palm (Nypa fruticans) swamps, especially in the water-holding phytotelma of the palm bract, which the pair use for bubble-nest building, courtship, and hatching of fry (Ref. 92085).
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Betta mahachaiensis

provided by wikipedia EN

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 mahachaiensis is capable of living in both fresh water and brackish water, a trait unique among fish in the genus Betta. This species grows to a length of 5 to 6 cm (2 to 2.4 inches). It is found in the aquarium trade.[3][4][5]

Betta mahachaiensis was discovered in 2012 by a team of biologists led by Dr. Bhinyo Panijpan's Mahidol University research group (with PhD candidate Mr. Chanon Kowasupat.[6][2]). It was found in the province of Samut Sakhon in Thailand, and its specific name is a derivation of the Thai name for the sub-district. Male individuals of the species are distinguished from species such as Betta splendens by iridescent green-blue stripes on a brown-black background.[2]

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, highly vascularised respiratory epithelium. The labyrinth organ is a morpho‐physiological adaptation that allows B. mahachaiensis to extract oxygen from air.[3]

References

  1. ^ Low, B.W. (2019). "Betta mahachaiensis.". IUCN Red List of Threatened Species. 2019: e.T181333A89804943. doi:10.2305/IUCN.UK.2019-2.RLTS.T181333A89804943.en.
  2. ^ a b c "New Species of Fighting Fish Found in Thailand | Biology | Sci-News.com". Breaking Science News | Sci-News.com. Retrieved 27 December 2019.
  3. ^ a b "Betta mahachaiensis". Seriously Fish.
  4. ^ "Betta mahachaiensis summary page". FishBase.
  5. ^ "Mahachai Betta". www.fishlore.com.
  6. ^ Kowasupat, Chanon; Panijpan, Bhinyo; Ruenwongsa, Pintip; Sriwattanarothai, Namkang. "Betta mahachaiensis, a new species of bubble-nesting fighting fish (Teleostei: Osphronemidae) from Samut Sakhon Province, Thailand". researchgate.net. Retrieved 27 December 2019.
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Betta mahachaiensis: Brief Summary

provided by wikipedia EN

Betta mahachaiensis is a species of bubble-nesting betta native to Thailand, 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 mahachaiensis is capable of living in both fresh water and brackish water, a trait unique among fish in the genus Betta. This species grows to a length of 5 to 6 cm (2 to 2.4 inches). It is found in the aquarium trade.

Betta mahachaiensis was discovered in 2012 by a team of biologists led by Dr. Bhinyo Panijpan's Mahidol University research group (with PhD candidate Mr. Chanon Kowasupat.). It was found in the province of Samut Sakhon in Thailand, and its specific name is a derivation of the Thai name for the sub-district. Male individuals of the species are distinguished from species such as Betta splendens by iridescent green-blue stripes on a brown-black background.

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, highly vascularised respiratory epithelium. The labyrinth organ is a morpho‐physiological adaptation that allows B. mahachaiensis to extract oxygen from air.

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