Royal Gamma Aggression?

[drillsar]

I just added a Melanurus Wrasse a few minutes later my Royal Gamma came out of his hiding spot and opened up his mouth. Is this bad? Anything I can do?

 

[reefing102]

I would watch them. It may just be a territory thing. I know my melanurus was skittish at first but then held his own against my neon dottyback. I wouldn’t worry too much unless you see significant torn fins or a beat up fish laying about

 

[sdbc]

My Royal Gramma does that from time to time. It almost looks like it's yawning. It's never shown any aggression to anything else in the tank so I doubt you need to worry about it.

 

[griss]

Most likely just establishing dominance as it’s “his” tank.

 

[Jimpens87]

Mine does the same thing when the clowns get to close but never attacks

 

[drillsar]

Update yea seem fine now; I never seen that behavior so I was worried. Kind of cool though.