what tropical freshwater fish is this ? help!

[sawzai]

i have 2 of these fish in my 50 gallon community tank.
i don't know what fish is it , i just bought it from the fish shop.
and i was wondering if it is agreesive or not and how big can it get ?

anyone know what fish is this ?

http://s1143.photobucket.com/albums/n638/sawzai/

[sawzai]

anybody ???????????????????

[Stradic]

Hi bro it should be in the family of Melanotaenia.
Not sure for the exact name.

[stormhawk]

Possibly Melanotaenia australis.

[bryan]

Yes it should be M.Australis. 5"-6" should be a good size. Greedy but peaceful tankmate.