Betta akarensis Regan, 1910
Akar betta
Betta akarensis
photo by Petersen, P.

Family:  Osphronemidae (Gouramies), subfamily: Macropodusinae
Max. size:  14 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 5.5 - 6.80000019073486; dH range: 12
Distribution:  Asia: Borneo.
Diagnosis:  Dorsal spines (total): 1-1; Dorsal soft rays (total): 7-8; Anal spines: 1-2; Anal soft rays: 26-28; Vertebrae: 31-32. Differs from other members of the species group by the following combination of characters: opercle with uninterrupted second postorbital stripe; yellow eye when live; anal fin rays 28-30 (mode 28); subdorsal scales 5-6 (mode 5); lateral scales 31-33 (mode 32); predorsal scales 22-25 (mode 23); postdorsal scales 10-12 (mode 11); preanal length 43.4-48.5% SL; head length 29.8-34.9% SL; anal fin base length 49.6-56.8% SL (Ref. 55025).
Biology:  Occurs in habitats ranging from peat swamp forest to acid water swamp forest (Ref. 55025). Normally found in a more stagnant sections of streams among the submerged leaf litter and overhanging bank vegetation (Ref. 55025). Mouth brooder (Ref. 55025)
IUCN Red List Status: Data deficient (DD); Date assessed: 05 December 2018 Ref. (130435)
Threat to humans:  harmless
Country info:  Known from Sarawak in Miri, Marudi, Sungai Akar, Sungai Tebu, Parit Nyadok, Sungai Nibong, Sungai Teku and Mukah (Ref. 56613). Also recorded from Rajang Basin in Sarawak, Borneo (Ref. 57780). Also Ref. 7050, 56613.


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