ok last couple days my oscar is attacking the glass in the bottom corner he openning his mouth wide like he wants to lip lock and moving his tail alot kicking up the gravel. I found vid on you tube of one doing same thing just wondering why?

Well, the first impression would be he is thinking his reflection is another oscar...did you change the lighting at all recently? I have my light hood tilted back to darken the tank a bit, and when I put it fully down to look inspect something he gets stressed a bit by the sudden brightness, changes color, and goes after his reflection. He rarely does this when the light is dimmer.

no same lighting lol i thing its cause my o is entering adult stage maybe or something

do you have kids?, if so do they hit the glass a lot, i have seen a fish do this once before, because it was at a restaurant, and a lot of little kids had been tapping the glass.

no kids just started doing it last cuple days

well mine has graduated from ramming the glass to spinning in circles.

Bio, mine do this too when they can see their reflection. I wouldn't worry about it!

x2 i have 7 fully grown oscars in my tank and thay do it all the time dont worry

7 fully grown O's? How big is your tank bud?

9x3x3 i have got some pics know but this pc is playing up bad i changed the one to theright but that wos it try and get it sorted in morning

mine does as wel mainly whe the light is on in the tank but off in the room, he also does it sometimes when he dosen;t want anyone near his tank.....pretty funny if u ask me....O's r so grumpy sometimes haha

my albino will do that when I put my hand in to move something. Bu it does that at my hand and after it has to inspect what I did and then adjust it to its liking