What type of fish doesnt need oxygen?

While some fish can tolerate lower oxygen levels than others, they still need oxygen to breathe. They extract oxygen from the water using their gills.

There are some fish that can survive for short periods out of water, such as mudskippers, but even they need to return to the water to obtain oxygen.

It's important to remember that all living organisms, including fish, need oxygen for cellular respiration, which is the process of producing energy.