Tench all alone

[Debra4]

I recently posted in the illness section of the forum, please read!
OK, so I am now down to just one fish in my pond. I haven't been sleeping well thinking about them.
Now I just have a 3 year old tench in the pond, he's used to being with 5 other fish. Will he be OK? I've added a new photo of the last goldfish removed, any ideas on what is wrong?

 

[Lisak1]

Oh gosh. I'm sorry to hear they all died! With no visible signs on the fish, it's hard to say what happened. But as for your other fish, he/she will be fine. I think we attribute human emotions to our animals - like loneliness - sometimes that aren't necessarily appropriate. If he survives this bout of whatever has hit your pond and you get things straightened out, you can get a companion fish to add to his little world!