Kickster, I think I would know if a fish had the same disease another one did
I'll give you an example.
I used to breed bettas, I had a male (Ace) and a female(Riley)
Now bettas are kept in separate tanks, right?
So then my female(in a larger tank at the time) got caught in a decoration and died. My male was right beside the tank and could see her.
Bettas have no emotions right, they are too mean and are just fish, right? Wrong, the male was eating heartily until he noticed that Riley wasn't there(couple hours afterward) then he stopped eating and about 2wks. later died
Another(this one's a different relationship)
I had a baby turtle(Mudslide) who I was caring for, he was in perfect health, until one day he just, died. Then his tankmates, all 3(1 8yr old, 1 6yr old, 1 2yr old) fell to the bottom of the tank and stopped eating(Mudslide was eating wonderfully before he died) I then had to let them go, and the oldest, Speedy, whom I've had since I was 4, looked back at me in deep sorrow, and then slowly swam away.
I am not claiming to know everything, but from experience, I KNOW that my animals, reptiles included, have feelings, and if you think differently, then why are you in this hobby, and why do you strive to create a "large and stress-free enviorment" if you want that for them, then 1. leave them in the ocean, and 2. Why bother, they are just stupid fish, right, so they don't know the difference between stress-free and not, right?
GO AHEAD, SQUASH THE POINTS, BUT YOU'LL NEVER SQUASH MY FIGHTING SPIRIT OR MY WONDERFUL MEMORIES OF THESE CREATURES!!!!!!!!!!!!!!!!!!!
btw, FISHKILLER, I think I'm just gonna ignore your post