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Betta enisae

Betta enisae
Gecko Betta
According to most sources Betta enisae is included in the Betta pugnax group/complex of closely-related species, an assemblage which also currently includes B. breviobesus, B. cracens , B. fusca, B. lehi , B. prima , B. pugnax , B. pulchra, B. raja , B. schalleri and B. stigmosa . B. apollon and B. ferox, two Thai species described by Schindler & Schmidt in 2006 are also tentatively included in the group although these are not recognised as valid by all authorities (the pair are omitted from Fishbase at time of writing, for example). Schindler & Schmidt also proposed that Betta enisae should be moved into the B. picta group on the basis of lateral scale/anal fin ray counts, plus its relatively small adult size. It is the only member of the B. pugnax group except for B. stigmosa to exhibit black transverse barring on the caudal fin of both males and females. 

The B. pugnax group occupies a somewhat enigmatic position within the hobby due to the fact that the individual species are notoriously difficult to identify correctly. The fact that different authors also tend to have varying opinions about exactly which species should be placed within a given group hardly helps the situation. What is clear is that a comprehensive phylogenetic study of the entire genus is required in order to make definitive statements regarding the position of the species in relation to one another. Until this occurs a certain degree of confusion would appear to be inevitable. 

Enisae can flash a brilliant blue anal and caudal slash that no pugnax complex fish has to that degree.