Question

Octopus belongs to which Phylum of the animal kingdom?

Answer 1

Hint: octopus are eight legged or eight armed animals which are found deep in the ocean. They have a bulbous head. They have three chambered hearts with one ventricle and two auricles.

Complete step by step answer:
Octopus belongs to the phylum Mollusca. Mollusca are of great importance to humans; they are a good source of food and jewellery as in pearls. They have soft-bodies, triploblastic (three layers of skin) and bilaterally symmetrical (body is a mirror image of one side) and coelomate.
Here are some features of Mollusca-
They are usually found in marine or freshwater; only few are found on land as in snails.
The body consists of head, visceral mass, muscular foot and mantle.
They have an organ-system level or organization.
The body is covered with cancerous mass which protects them from damage.
They have a well-developed digestive system; radula helps in chewing food.
Open blood circulatory system that is organs float in the blood
They respire through their skin or gills.
The sexes are separate, and fertilization is external or may be internal.

Octopus belongs to Class Cephalopods and phylum Mollusca.

Note:
They usually protect themselves by squirting ink to their predators; also, these organisms are boneless, therefore they can squeeze into (or out of) tight spaces. They are quite intelligent organisms.