Hello all! I was wondering if anyone would know why or has experienced something similar. I have an angelfish, platys, Corys, danios and neon tetras in one tank. My angel is only aggressive towards the platys. It never bothers anyone else and will calmly swim around the neons and danios. But if it sees any of the platys swimming near the top of the water column, it will swim all the way across the tank to chase them away. Look forward to hearing your thoughts/experience.