Aggressive clownfish

[dr.fish123]

I’ve noticed my clownfish is only mean to yellow fish?? She is super mean to my watchman goby and now my new clown goby but she will leave my other fish alone! She just goes up and bumps them with her face. I haven’t seen her bite them. Is this normal?

 

[Peace River]

Aggression is often part of the dominance aspect that is wired into clownfish. Sometimes this can show itself in the clown fixating on certain things whether it is a shrimp, a rock, things that are yellow, or your hand. Whether or not it is normal, it isn't unusual.