Why is an octopus a mollusk?

Answer 1

The phylum mollusca is a large phylum of many different invertebrates. A few of the defining characteristics are:

1. Unsegmented soft body

2. Most have an internal or external shell

3. They have a mantle - secretes shell

4. Has a muscular foot (like snails) or tentacles (like an octopus)

5. Have a radula - scraping structure

There are more however