Good thing I checked before making a similar thread ^^". I had no dreams that relate to rational fish horror problems, but I do have crazy dream irrationals ones though. Especially seeing multiple bettas in the the same tank.
Last night my betta fish Booney(SIP) was in my dream....I still miss him and the dream tore open the healing wounds,. Don't really remember what the whole dream was about, but I vividly remember in my dream after seeing Booney swim happily in a tank, I recalled I had buried him months ago and confuse with how he was alive and well in front of me.
In another dream, a female betta fish reminded me of Shiva(SIP), even though the female barely looks anything like him. It was her fins that reminded me of him, light pale fins outlined in another pale color. She was also pale in color, looking almost white, with a few light color blemishes here and there on her body. The fish store looked similar to a gamestop store oddly enough. For the longest while in the dream, I was trying to decide should I get her or not. I even remember I still have Ghost and getting her would ruin my ten gallon plans. In the end I couldn't leave her behind and decided to get her. She was also living with a few other girls and the employee had fun making sure he got her. Then suddenly out of the blue these dark blue fish appear in the tank, maybe 2-3 times bigger than the female bettas.
Another dream, must had been when I first got Booney when he had SBD(and of course developed it the day after I got him). I had a few bettas in my 2.5 gallon and they kept floating up out of the water. For the entire dream I kept gently pushing them back into the tank. Frantic over the fact they keep on floating out of the tank.
One dream my betta fish were like frogs, but out of the water they were more insect like. I had three betta fish in this dream, Booney, Ghost, and another one but I don't remember what he looked like. The dream also took place at my grandpa's house(I was living there when I first got Shiva) and I was almost finish setting up the tank. I think the tank is bigger than a 10 gallon and it had a wooden canopy with part of it folding up when I want to get into the tank along with its own stand that matches. The betta fish were happily hanging out on the outside of a glass vase. They didn't wanted to go into the tank. At the end I freaked out because I remembered they all can't be in the same tank with each other. Even though they got along fine outside of the tank.
I think the very first betta fish dream I had, possibly might have a piece of my fantasizing of maybe breeding Shiva one day(I have no interest in breeding now though, where would I put all those babies). He was in the one gallon tank I had at the time, but it looked much bigger when I look at it from the side(think in magic terms like in Harry Potter, small tent outside, huge inside). There was a orangish octopus looking thing in there with him and they had made three babies(looked full grown in the dream). I noticed Shiva and the orange fish was "kissing", then saw something odd was going on. It was too late before I realize that the orange fish stunned Shiva(like in betta fish breeding where the female becomes motionless) and had swallowed him. I was so upset after that. Also in the dream, apparently the tank doubled as a drink with a straw poking out of the lid.
That's all I the dreams I can think of on the top of my head. I'll post more if I remember more or a new weird one pops up.