Hi Jmack
welcome to fishlore..
Its a interesting thought for sure. I have wondered about it myself. Most often when fish die, and more than one, we can usually attribute it to an illness that can be spread to other fish or water quality issues. These are usually the reasons I can think of.
But I had to wonder myself when I lost my two female Bettas awhile ago. One was sick with huge tumors which was not a disease that the other could catch. They were in a divided ten gal tank together for about a year and a half at least. When one of them died, the other went into a depression and wouldnt eat, was lethargic and would stay off by itself. I really feel that this
betta was depressed and missing the lost Betta. She died 30 days later for no apparent reason. Do fish get depressed...? I do not know. Do they have the capacity for such things? I really dont know. I do know that in the animal kingdom, dogs, cats, birds and all kinds of animals react to the loss of another or mate and do get depressed and can die of a broken heart. Can our fish actually get depressed and die off? I guess it can happen, but my logic has to say that it is most likely the result of a problem with the fish as a whole or a water quality issue. But my heart can not say this is so.
