Need help identifying a fish species

[damien_chia]

Hi , can anyone tell me which species is this fish? Bought it from Tiong Bahru cos I tot it looked nice, and the shop owner says its gentle. But came back the male turn quite aggressive... dunno why...

[Emokidz]

It's a yellow panchax, a type of killifish. Yes, it can be agressive towards smaller, more shy tankmates. Keep with similar sized fish.