Why do my white skirt tetras pick at my powder blue gourami but have never picked at my guppies?

Ive had my fish tank for 3 years and have 4 white skirt tetras that Ive had since the beginning and Ive had guppies and mollies and have never had a p

I've had my fish tank for 3 years and have 4 white skirt tetras that I've had since the beginning and I've had guppies and mollies and have never had a problem. I just got a blue powder gourami and one of my tetras is nipping at it. Why would they go after my gourami and nothing else?

or:I've had my fish tank for 3 years and have 4 white skirt tetras that I've had since the beginning and I've had guppies and mollies and have never had a problem. I just got a blue powder gourami and one of my tetras is nipping at it. Why would they go after my gourami and nothing else?

Tags: