Usually, fish swimming upside down is a sign that their health is not good, or worse, they have not survived.
Upside-down Catfish is the common name for several species of catfish in the genus Synodontis, especially Synodontis nigriventris.
The reason for this strangeness is because the body structure of belly-up catfish is a little different from normal fish in the swim bladder.
The way it works is different from most fish relatives and does not cause too many difficulties for catfish.
Upturned catfish spend most of their lives swimming on their back.
This back-swimming fish originally originated from Africa, but thanks to its beautiful color, high adaptability, small size, effective algae cleaning and, importantly, unique swimming style, it was quickly hunted.
Nowadays, back-swimming catfish can appear in any freshwater body or aquarium store.