Originally Posted by Basement Bettas
Fish don't get depressed. That is a human emotion. Fish get sick.
People think they know how animals work, but they don't. Why do elephants mourn for days after a member of the herd has died? They feel loss, they feel upset ... animals will even starve themselves due to the depression that occurs when a member they love has died or been lost. People who think they know animals are the ones who will be the most surprised.
Anyone can breed fish, but it doesn't mean that you know everything about the species. Same goes for any other animal.