angelfish nipping

[shellyx]

Hi, this afternoon I caught my angelfish nipping my pearl gourami on the lips it's the first time I,ve seen her doing this my pearl got fed up & nipped back. Their in a 55 gallon with my elephant nose. I think it's aggression so the only thing I could think of doing was re arranging my tank. Do you guys have any advice on this as I,ve only had an angelfish for 5wks & is it going too become a problem. Thanks