So, I have a 20 gallon tank with a male and female dalmation mollie and an algae eater. I've had them at least a month and they've all gotten along up until this week. Every time I feed them the male gets super aggressive. He'll start eating and they're fine, but the moment the female tries to eat he attacks her and does so relentlessly. Now she just hangs out at the back corner of the tank and the male mollie refuses to let her eat anything. Is this normal behavior? What can I do to solve it. I have two other tanks, a 1 gal with a male betta and a 5 gal with 2 female betta, so I'm thinking about moving some fish around to get him away from the female mollie, but I'm not sure who would be good with who. Any suggestions?