Who or which Betta fish takes care of the eggs?

Here's why:

* Nest Building: The male Betta constructs a bubble nest using his mouth, carefully attaching it to plants or other surfaces in the tank.

* Fertilization: After the female lays her eggs, the male fertilizes them externally.

* Egg Protection: The male then guards the nest fiercely, keeping it clean and aerated with his fins. He will also move any fallen eggs back into the nest.

* Fry Care: Once the eggs hatch into fry (baby fish), the male continues to protect them and guide them to the surface for air.

This dedication to his offspring is a fascinating example of paternal care in the animal kingdom.