The correct option is B Octopus
Devil fish is the common name of Octopus. It is called so due to its appearance. Also, it was considered evil by the fishermen in older times. Octopus belongs to phylum Mollusca. Additionally, there is also a true fish known as devil fish (sting ray).
Aplysia is commonly called as sea hare. The common name of Dentalium is tusk shell and that of Sepia is cuttlefish.