they didnt have to beat him like that

ok, can someone tell me what’s going on here. In my tank I have a 3 strip damsel, ocellaris clown and a lawnmower. I got a tomato clown sat night and I put him in the tank and all 3 fish came out and started attacking him, even the lawnmower. They beat him for like 10 min. so I turned off all the light in the tank. Sun when the light come on, it seems they had beaten him in the dark and was still beating him so I put him in the sump. Any idea why they dislike this fish so much till every the lawnmower jump in.

 

Because you have other territorial fish and are introducing a fish that is also territorial?? Especially in a 29g.....

That would be my guess.

 

The same thing happened to me last week when we added our puffer. I through some shrimp in there to distract the others and that worked...well except the damsel kept being nasty. (it went to LFS for a new home)

 

mixing different kinds of clowns in a tank that small is never a good idea