Octopus and Sepia belongs to which phylum ?

APhylum Arthropoda

BPhylum Echinodermata

CPhylum Mollusca

DPhylum Annelida

Answer:

Phylum Mollusca:

This is the second largest animal phylum
Molluscs are terrestrial or aquatic (marine or fresh water)
It has organ-system level of organisation.
They are bilaterally symmetrical, triploblastic and coelomate animals.
Body is covered by a calcareous shell
Body is unsegmented with a distinct head, muscular foot and visceral hump.
A soft and spongy layer of skin forms a mantle over the visceral hump.
The space between the hump and the mantle is called the mantle cavity in which feather like gills are present. They have respiratory and excretory functions.
The anterior head region has sensory tentacles.
The mouth contains a file-like rasping organ for feeding, called radula
They are usually dioecious and oviparous with indirect development

Examples:

Challenger App