No, catfish aren't arthropods, they have a backbone and are thus in a different phylum, Chordata. Arthropods are characterized by having an exoskeleton; bones for an internal skeleton would indicate a non-arthropod.
All species of catfish are vertebrates. They belong to the classification of Fish, and all fish are vertebrates, having a backbone and internal skeleton.
invertebrates
vertebrates and invertebrates different?
They are vertebrates.
Vertebrates have spinal chord and invertebrates don't.
Vertebrates have spines & invertebrates do not have spines.
Invertebrates.
invertebrates
Vertebrates.
The chordata contains both vertebrates and invertebrates.
all vertebrates have endoskeleton but not all invertebrates do
The major difference between vertebrates and invertebrates is that vertebrates have a back bone and invertebrates don't