need help with my oscars. i just bought a new 4 ft tank and put both of them in there. there started chasing and biting each other lips. and sometimes they "shake" need help 
here's a vid
http://www.youtube.com/watch?v=nCy8...DvjVQa1PpcFOdSyf1N7wYUBEpLHeNHUJi2rG5_A2gMuE=

here's a vid
http://www.youtube.com/watch?v=nCy8...DvjVQa1PpcFOdSyf1N7wYUBEpLHeNHUJi2rG5_A2gMuE=
thanks mate