Clownfish Agression

[Jono562]

So I've these two ocellaris clowns for about 4 months. They were purchased together as a pair. Haven't had any issues with them up until a few days ago. Yesterday I noticed "Rollie" the smaller of the pair hiding in the rocks and caves. Not unusual for him to be exploring but he is definitely hiding from "Bingo" my larger clown who is chasing him aggressively around the tank and visibly biting him. I also have a Cardinal fish and Firefish which Bingo doesnt bother. Any advice would be great. Thanks!

 

[Peace River]

Although this can be stressful to watch, this sounds like normal clownfish behavior and is part of how they are wired as part of establishing dominance. I encourage you to watch for body injuries, but IME I am patience with aggression and even some fin damage.

 

[Jono562]

Thanks. Yeah it definitely is hard to watch.