Plants suitable for betta fish include Anubias barteri, Ceratopteris thalictroides, Ceratophyllum demersum, Moss, Littorella uniflora, Microsorum pteropus narrow-leaf form, Java moss, Marimo balls, etc. These plants not only provide a good living environment for betta fish but also help maintain water quality and provide shelter.

When choosing plants suitable for betta fish, there are several considerations to keep in mind:
Non-toxic: Ensure that the selected plants are non-toxic to betta fish and avoid using poisonous plants.
Strong adaptability: Choose plants that have low requirements for water quality and light so that they are easier to maintain.
Provide shelter: Choose plants that can provide shelter and habitats for betta fish to increase their comfort.
Not occupy too much water area: The selected plants should not occupy too much water area so as not to affect the swimming space of betta fish.
Specifically, here are some plants suitable for betta fish and their characteristics:
Anubias barteri: Strong adaptability, low requirements for water quality and light, and can provide good shelter and habitats for betta fish.
Ceratopteris thalictroides: Grows rapidly and is easy to maintain, and can increase the oxygen content in the water.
Ceratophyllum demersum: The soft stems and leaves will not scratch the fish body and can also absorb harmful substances in the water.
Moss: There are many varieties and beautiful shapes, which can create a natural ecological atmosphere.
Littorella uniflora: With developed roots, it can stabilize the bottom bed and provide hiding space for betta fish at the same time.
Microsorum pteropus narrow-leaf form: Suitable for beginners, easy to plant, and can provide shelter for betta fish.
Java moss: Grows quickly and needs to be trimmed frequently, and can provide shelter for betta fish.
Marimo balls: The round and fluffy balls are very popular with betta fish and can also help maintain water quality.
By reasonably choosing and arranging these plants, a healthy and comfortable living environment can be created for betta fish.