What does it mean when your betta flairs up at you everytime you look at him. I got another betta fish about a month after my first betta Aries and put the new one next to his tank, with a cardboard to seperate them from seeing each other. Last week I cleaned their tanks out and as I was putting them back, but didn't put the cardboard right away. Well Aries saw the new one and got mad and was attacking the side of his tank. Ever since then Aries now flairs at me, even when i am not near the tank and just in the room. Could it be he is jealous or angry because I have another Betta fish. I don't like him not liking me but don't know what to do lol. I know this is not important but just wondering if it happened to anyone else.