Betta fish are probably among the most popular fishes to breed these days and it is easy to see why. These fish look absolutely stunning with their vibrant colors and long gorgeous fins, it is hard to imagine that they actually originate from the murky waters of rice fields in Southeast Asia. Apart from how beautifully they look, another plus point of having the Betta fish as a pet is how tough they are. These fish come from some of the most dank and poorly aerated waters and have evolved to be extremely hardy. You can easily keep a Betta fish in a tiny little water container with no filtration and no aeration and they would still survive well. This is because it is one of the few fish that is actually fine with taking in atmospheric air if the oxygen concentration of the water is low.
But the downside to the Betta fish is that they are extremely territorial. In Southeast Asia, they are better known as Fighting Fish. When two male Betta are placed in close proximity, they would battle to the death, a brutal sport that the local kids partake in. You can easily tell the male and female apart, the male being the colorful ones and the females generally plain and unattractive. The female Betta also tends to be a little less aggressive. This would mean that you would only be able to keep one Betta in your fish tank and have no other fish in there or it might tear the other fish apart.
When choosing suitable fish tank ornaments for your Betta fish, you would have to take into consideration their aggressive nature. You would need to ensure that your fish tank decor does not injure the Betta in any way.
The first thing to avoid is having any decor with a reflective surface. Avoid mirrors like the plague. If the Betta sees its reflection in the mirror, it will assume that there is another male in there with it and will go into attack mode. It will keep hitting itself against the mirror until it eventually bleeds and dies. You might find an aquarium toy sold with a mirror that is supposedly meant to keep Betta fish stimulated but it is not a good thing to have for this kind of aggressive fish, so I would recommend not getting it.
You would want to get an ornament that provides the fish with a small cave to go into. One great aquarium decor to get is a floating Betta log, which is a plain hollow log that floats at the surface. Since Betta fish breathe in atmospheric air as well, having them close to the surface during their rest time is a good idea. Betta do need a secluded place to go into and rest from time to time.
If there is space constraints in your tank and a floating log would consume too much area at the top, you could opt for one that is placed at the base of the tank. Or you could also get soft artificial plants that would allow the fish to swim in between and hide when it feels a need. Do not get artificial plants that are stiff and hard, or they would scrape their bodies against it too much and cause sore to appear.
Try your very best to ensure that the ornaments you get are natural looking such as rocks, plants and logs. You can put normal fish tank decorations if you want such as sunken ships and castle, just make sure there are not sharp parts that might injure it. Being aggressive, Betta fish have the tendency to dart into the cave especially if spooked, so you do not want them injuring themselves against a sharp part.