I think i got a Brevis tiger fish

[Jiyowel]

I've kept fatfs, vatfs, hydrocynus cf. Big eyes before but this one looks different. It's very shiny, very aggressive (attacks larger dither fish) and has a very red caudal fin. My former big eyes and vittatuses doesn't look and act like this.

 

[fishhead0103666]

C Chicxulub
Also what are the goldish fish at the bottom of the last picture?

 

[Jiyowel]

C Chicxulub
Also what are the goldish fish at the bottom of the last picture?

They are not gold fish. They are longfin tinfoil barbs. One of them is missing a fin

 

[Chicxulub]

That's a vatf complex fish. His tail is red and his colors are better because he's dominant.