This could be caused by over-feeding. Fish have air bladders and they control how they float in water. If they eat to much this may damage the bladder and in return cause them to float abnormal.
it will always be at the top of the water with the upper side of it turned down
Probably swim bladder disease. Dirty water, stress, over feeding (leading to constipation), and temp fluctuations will cause this.
it looks like they have a big bubble in their side
usually a male has longer tail fins but they are about the same for side fins
It's Very simple, the reason your betta is on it's side is because it has this sickness called swim blatter disorder it is a sickness where the fish's stomach is bloated so the air bubble in the stomach is to big and makes the fish float up to the top of the tank. The betta is not in pane I heard from this but it is defiantly annoyed. It happens usually in young bettas that eat to much brine shrimp so check if the food your giving it contains any. If your betta however is a two finned betta its probably because your feeding it too much
No, sometimes they float on their side. But some whales have "negative bouyancy" which takes them to the bottom when they can no longer swim.
The male Betta does this because he can. He doesn't know if or when a female will come by, so to be on the safe side he keeps himself ready to impress a female if she does turn up.
diseased.
It most likely means that he/she is sick because that is what happened to my betta fish. make sure you don't overfeed your betta fish because it can lead to constipation and that will cause trouble for the betta fish
if you're talking about the safety of a male betta (the kind with long, flowing fins) with other fish in your tank...male bettas WILL attack most fish of similar size and appearance. But ive seen bettas go after fancy goldfish the size of tennis balls.also, be warned that a male betta is an easy target of fin nippers. the worst fin nippers are generally schooling fish like tetras and especially tiger barbs. ive also had bad expieriences with danios. when a bettas tail is bitten, his delicate fins can be ruined by painful fin rot. And he may fight back, especially if the nipper is smaller than him.female bettas are usually fine in a community tank. but, to be on the safe side, i would keep a male betta in a separate tank, maybe five gallons. you can really show them off that way.but in case you're curious, no, bettas don't really have natural enemies in the wild, just male-to-male fights.
bettas are not sick when they lay on their side they sleep that way
I think your betta fish is a female. I'm assuming that it is pregnant because female betta fish have a white spot on their stomach if they're pregnant. If you have another male fish, [ but he has to be ready to mate. You can tell if he is ready if he is creating a bubble nest.] try putting them together. Before you do that, try looking for infos on them first [just in case]. I don't want things to go wrong because I might've told you the wrong things. I'm just a child that happens to take care of 2 betta fish and doesn't know about them much.. I'm not a professional of betta fish, but I found these information on the internet. I have two betta fish myself, and one lost its color.I wanted to look more info on betta fish, and learn how to take care of them better. Eventually, I learned many new things about them. Maybe you can learn more about betta fish since you are taking care of one. It's just a suggestion, but I tried looking them up on the comp and it helped me a lot. I just wanted to let you know what i have experienced. ^^ I can give you a site that tells you a lot of info about betta fish. I got most of my info about them in this site: http://www.bettatalk.com/basic_care.htm If you want to learn more about betta fish, then just go on google, and search about them. I hope this helped and hope that your betta fish is alright.^^~!