I dont know what happend ... I think I feed it a pellet that was to big for it and it chocked I saw my pond after coming home today at 7:30 pm and there he was. I think he chocked because he died at the bottom with his mouth open. I feel so bad. I think I killed my new fish

The fish wasn't in there very long. Could it have been sick when you brought it home? Some fish stores (or places that sale fish) are only in it for the money and healthy fish are of no concern. Sick fish bring people back to replace the deaths. Since you hadn't had your fish in the pond very long I suspect it was sick when you bought it. At least this is a good possibility.

Scott

I agree with Scott, sickness is a strong possibility, keep a close eye on your other fish for any odd behaviour. Chocking is also a possibility.

Did you check your water parameters?

Sorry you lost your new fish.