2 Aliens

Found 2 aliens growing tall in my box of Fittonia. I have asked my son if he has throw watermelon seeds into this plant and he said no. The 2 aliens were growing everyday and it was interesting to see what plant were they. I dun think the young shoot of a fittonia look like this.

Edited on 19 July 2015: I have lost my box of Fittonia. All dried up and died.