Ive got 3, 4 inch Oscars in a 5 foot tank i want a pair Ive taken the last one that was getting bullied out?

Question

they are chacing round the tank and getting injured

Answer 1

YOUR TANK ISN'T BIG ENOUGH FOR A BREEDING PAIR OF OSCARS.

Answer 2

I have had Tiger Oscars up to 11 inches in the same tank. I have a 70 gallon tank with 6 Red Tiger Oscars. I have put in pieces of slate leaning into the corners where they can hide. I have a lot of plastic plants that reach at least at least half way up the tank.
I have had these fish since they were about 2 in. I buy feeder gold fish and there are always a half dozen swimming in the tank. The Oscars have become less aggressive as they are growing. Keeping them well feed and supplying places for them to hide keeps them from injury. Each fish will claim an area of the tank if there are to many the smallest will probably be killed. Like all egg layers if a pair lays eggs it will chase (or kill) the other fish away from area of the eggs. One way to try to tell the sex is looking at the dorsal fin if its is rounded at the end it is a female. If it comes to a point it is a male.

Answer 3

You can have a pair of male and female oscars and that will work. If they are injuring another fish, they are trying to kill it and get it out of there, which means you could have a pair already, or the fish are just getting mature and agressive. Usually a male will stake out a corner of the tank and only allow the females to enter. Of these females, one will chase the others out of the area and seem to welcome the male. If you see that, you have a pair. Remove the other fish. Male and female once paired will do a jaw-locking, pushing game and a side by side shimmer dance. With only two fish left, it's hard to know if you have a pair without seeing them, but it seems likely by what you described. Males generally get bigger and grow faster and have bigger broader heads, with a wider flatter mouth and wider shoulders. The fins tend to be longer and pointier. The females tend to have smaller heads and beakier mouths, more rounded fins and rounder bodies. Keep the water very, very clean and slowly turn it up to 80 degrees. Give them lean meat to eat and some fresh greens like spinach, and give them a smooth rock or piece of terra cotta tile to lay the eggs on.

The small one in the corner should be taken out if it hides all the time. They will kill it or deprive it of getting food. The big one is probably a male and he wants to keep the others away from the top so that he can get all the food. The one on the right could be a girl, but time will tell. They are still too young to be pairing up. The stiff shake is to show submission and that they are not a threat, but that they will fight back (yeah, right). Oscars should all spar with the mouth thing when young, but when mature and pairing up, it will really become obvious. It looks like constant tug of war, like they are almost fighting, and their mouth area can get scraped up. Don't be surprised if water flies out of the tank. Feed them alot when young, especially the smaller ones. Give the big one a big piece so he cannot eat it very fast. Then give the smaller ones alot of smaller bites. Feed them until they are fat to help them catch up in size. Change some of the water once or twice a week, because fish give off chemicals to stop other fish from growing. You must be the gal who asked the question. If you want a pair, get more oscars so that they can socialize with each other more, and so that one fish cannot bully just one fish all of the time, but is too busy looking at all of the rest of them. With a school of fish you can see the differences in look and behavior, and alot more socializing. As they grow, and crowd the tank, then remove some as you go, eventually getting down to couple that have paired up.

http://www.cichlids.com/uploads/tx_usercichlids/01_Breeding_Oscars.jpg
Here's a pic of oscars. Notice the male on right has a big head, higher forehead and is thick on top by the dorsal. The point on the lip is skin from bumping the glass. The girl on left has a smaller more tapering head and the forehead tapers back more. She will be wider by the belly. It helps to view the fish from the top of the water.

Answer 4

I have never had luck keeping more than one Oscar in my tanks. I would love to know the answer to this as well. Both of mine are 2 years old, and are as big as a saucer. Sorry that I could not answer you though

Answer 5

That's the first Pythagorean triad! whoopee!

Wish I knew something about fish but I don't, sorry...