Betta omega Tan & Ahmad, 2018

Family:  Osphronemidae (Gouramies), subfamily: Macropodusinae
Max. size:  8.12 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater; brackish
Distribution:  Eastern Indian Ocean: Malaysia.
Diagnosis:  This species is distinguished from its congeners by the following set of characters: black markings on lower jaw that are continuous with two black downward curved bars on the anterior throat, ending with rounded bulging ends near edge of lower jaw resembling a distinct omega (?) pattern; opercle uniform brown with light dark brown mottling, operculum without lower distal margin black; black transverse bars on the dorsal and caudal fin interradial membranes; absence of a dark distal border on anal fin (Ref. 127779).
Biology:  This species is currently recorded only from the remnant black water swamps in Johor, Malaysia. Maximum length based on type specimen, to be replaced with a better reference (Ref. 127779).
IUCN Red List Status: Critically Endangered (CR); Date assessed: 01 February 2019 (B2ab(iii,v)) Ref. (130435)
Threat to humans:  harmless


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