Do oscars recognize each other or just changes in their enviroment. Today around 4:00pm I took one of my 3" oscars and placed it in my other tank with my three 6" oscars. I did this because their tank is larger and he is growing much quicker then his original tank-mate and the other 2 oscars that share the same aquarium. I got home at about 1:00 am and all 3 baby oscars who are usually rushing to the surface to eat hid and stayed at the bottom. The one even was on its side stressed. I went into the other room and fed my larger oscars and put in smaller pellets for the 3" one and he ate one and looked really uneasy around the big albino. I am asuming he got a lashing while I was gone because he would not let the other oscars out of his sights while the just swam together. I am getting a new tank anyways so my babies will soon have the 160 gallon until they can all be together. (Trying to find a nice breeding pair). Well anyways I put the baby back with his original tank and as soon as he hit the water and swam with the others maybe 10-15 seconds later they were all alert and ready to eat. It was just so instant like they knew who he was. I wonder if he will have some good stories to tell them!

you took their buddy away juvies feel safer in numbers and the last time they saw u,u took their buddy away so they just scared.

its all about safety in numbers.

in the lfs all the o's look excited to see u and when u buy one and take him home he parks on the bottom and sulks for a day or two