Just wondering, 'cause yesterday, a large, beautiful red-cap oranda was floating dead in my pond. I had just fed the fish, and I admit that I did not do a head count, but I didn't notice anyone missing, and sure did not notice a dead fish.
15 minutes later when I finished with some chores in the turtle pond, there in the main pond was the oranda, freshly dead. I'm not absolutely sure it died in the last 15 minutes, but it sure looked healthy and well with red gills and clear eyes and all that. Not a mark on it. No disturbance to the pond, no water was added, NOTHING!
I can't think of any other reason for it to have died ... Could it have choked on a piece of food?