Ok well this only grows to about an inche long, its not agressive but is sometimes territorial. Im not exactly sure if this fish is exported over seas so i guess u would have to go to ur local LFS & ask them if they can order Empire Gudgeons from Australia.
Food wise, in the wild these fish eat larvae & insects so at home i feed them brine shrimp, worms & they even eat the small cichlid pellets.