my oscar Megatron is constantly attacking my same age, smaller oscar StarScream. what can i do to prevent this?

Hello drewstrse and welcome to the site! there can be many reasons for the aggression. Can you give us an idea of your tank setup, (size tank, tankmates, filtration,etc), that will help the pros get your problem solved most efficiently.

hey there and welcome to the forum.
Cebo's questions neeed some answering, than we'll see wha we can do.

I may be 2 males, and territorial issues are a common thing between 2 males.
If the tank is big enough a divider may help o sort things out, but with 2 males problems may be an ongoing thing.

dob the bully one in into his parents...

LOL...
hope all goes well
i have the same problem but i have a lil hidy hole for my lil O
so he hides when being bullied

My Decepticons are in a 26 gallon bowfront. I know I need a bigger tank, it is in the works. So until next month i got to find a way to keep Megatron from destroying Starscream. Megatron has already ate both my Zebra daino's. So starscream is gonna be the only tankmate until the move.

if aggression continues you may consider placing a divider into the tank.
Chances are the agression issues may cease once your fish get a decent sized tank.
How bigga tank are you planning for?
Keep in mind a 100Gl is still small for 2 full sized oscars, and if you hang around at the site long enough, i promise you you'll have very big and healthy fish in no time.
Think big.
I was adviced to measure the wall where i was gonna put my tank and buy a tank that was so big it'd just fit.
i was told elsewise i'd be upgrading over and over again, until i wouldt have a tank the size of the wall.
And i never regretted taking that advice for a single moment.

thanks for the input. i am thinking of 120 gallon tank. i figured that would be good size, cause i do want to get 2 convicts as well.

120 gallon should work for 2 oscars and 2 convicts. Remember Good filtration and frequent water changes are key. Like Noddy said, stick around the site for a while you will learn plenty and you will have MTS in no time.

Sometimes 2 oscars just will not get on and you may have to accept that, however they are more likely to fight in a smaller tank. Put a divider in and get the bigger tank ASAP

If you only have one filter have the input on one side of the divider and the output the other side. If you have an internal filter get a large external cannister, you will need one to filter a tank twice the size of the tank you are going to get, i would go with a fluval FX5

Im having the exact same issue, except it is the little one thats picking on the bigger one. *sigh*