Question

10. Why is an octopus classified under mollusca and not under arthropoda?​

Answer 1

Answer:

Octopuses can camouflage very well in their surroundings. They have ink glands that they use to defend themselves or escape from predators. They show all the characteristic features of Phylum Mollusca and are triploblastic, bilaterally symmetrical, and found in various regions of the ocean.

Answer 2

Answer:

Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks[a] (/ˈmɒləsk/). Around 85,000 extant species of molluscs are recognized.[3] The number of fossil species is estimated between 60,000 and 100,000 additional species.[4] The proportion of undescribed species is very high. Many taxa remain poorly studied.[5]