Thanx for your answers... the remaining three fish are happy in their new home... they are all light in colour and have 4 black dots along the sides and 1 black dot with an orange ring on the tailfin... they are pretty long and slim... and have black markings around the eyes...
I will try to shoot some photos from the tank when I get home from work tonight....
allthough it was pretty damn hard to get som decent photos of my new snakeheads (they're still pretty shy) i managed to get a few shots with the tank lightning off... hope they can help to identify the little critters...