Choy.. the pic a bit blur leh.. bet this guy must have been a dread to shoot...
Anyway.. i am not sure about this but i think these guys or the males at least have a much longer dorsal fin.. something like a little trail that comes out.. i have one big male in my tank right now flaring.. really quite nice.
Also.. if you look closely.. i think they have 2 sets of pelvic fins instead of the regular 1.
in japan, they called this the bell finned tetra...but i cant find anything with the english typing in google... think i need to use jeepun liao.
check out these tetras..both of which i think i brought back for you and you shot...
4th and 5th from the end up.
Also..i think the tank has a mix of tetras.. the one you shot may be the one that is 2nd from the end up...whereas i have a mix of both 2nd and 5th in my tank.
http://www.geocities.jp/zakkycharacin/bstype.html










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