I got 3 dalmatian mollies tonight (2 male 1 female) and after adding them to the tank one of the males was really aggressive. He has been chasing mainly my tiger barbs around. I was afraid it would be the other way around if anything. The fish are about the same size so it isn't like the molly is bigger than the barbs. The other male and female are fine and non aggressive. I just wondered if this is normal? Should I be worried about it? The barbs are faster so it can't catch them but I don't want them stressed out. I am hoping tomorrow it has calmed down some. Anyways, any info would be great. Thanks!