My oscars are about 8-9 inches now and they will be a year old soon. I noticed a lot of tail slapping and jaw locking at least two months ago and since then they have been doing it way more often. now the o that i think is the female is MEAN!! it's difficult for me to clean the tank because she attacks me, and she has been extremely aggressive towards the other tank mates. She even tries to get me through the glass when i walk by. She stays in one spot, right over a few flat rocks but i haven't noticed any eggs or fry. I'm worried because she is not really eating, so i tried some worms and she attacked them first and then ate them. Am I worrying too much or is she sick?