Why has my goldfishes tail come off?

Question

He is head down on the bottom of the tank?

Answer 1

His tail has come off?  Usually if the tail is "rotting" off it is due to poor water conditions.  Are you maintaining a weekly maintenance schedule water changes etc.  

You will need to keep the water quality up and use fin rot meds to help him heal faster

Answer 2

My fishes tail came off to that usually means that he is the leader and head down that means he is watching the other fish

Answer 3

I think he's dead honey if his head is at the bottom and his tail is off. You prob had too much ammonia in the tank. My beloved fish Oreo did that. I am still sorry to this date

Answer 4

change his water and get him some medicine for tail and fin rot. hurry or he is going to die

Answer 5

Maybe it has fin and tail rot,or lost a fight.

          Debbie O

Answer 6

possibly fighting with other fish or disese fungus