why is octopus kept in phylum mollusca???????

it dosent have any shell????????

its not imp dat ol d organisms of phyllum mullusca have a carbonate exoskltn un dem

octpus is called a molluscs cz its got a rough chitnous skelton on head.. tentacles in d head region ( which ol d mullsca hav) and its body is dvided into hump, head and muscular foot.

another reason is dat octps has a mntle cavity.

the abuv reasons mak it a member of phylm mllsca