I thought it would be interesting to see if this happens to all of us, some of us, or just me.
Ever since I was a pre-teen I have kept pets in tanks. I'm talking about rodents mostly, and only in the last few years have I switched to fish. My twin sister also had rodents growing up, and we both had and continue to have these dreams, or nightmares rather. Here's how they work. In the dreams I discover a tank in my room that I had forgotten about or that I had thought was no longer inhabited because the animal had died years earlier, and then to my horror I discover that in fact the animals have not died but have continued to live on in these horribly crowded, filthy tanks. Usually there are tons of baby hamsters etc and poop and urine soaked bedding filling up the tank, and the animals inside are usually insane from months or years of utter neglect. Pretty horrific stuff, and we both usually have these dreams when we're stressed out.
Now in the last few years I still have these dreams but now they involve fish and the tanks are now filled with hundreds of sickly, skinny fish with sores all over them and the water is green and foul and the floor of the tank is covered with poop. Last night I dreamt that I found my old crayfish in a tank (he died a year ago). He was sitting in this 10 gallon tank, not moving, and he was huge and white and his shell looked like it was made out of gel. It looked like one of those weird things that you put in water and it gets like 20 times bigger, but basically is mush. It was just like that, but alive!
So, I may just look like a psycho, but I'm curious if anyone else has these dreams.