What are the differences between Mollusks and Cnidarians?

Answer 1

Mollusks

• Soft bodied animals that typically have an inner or outer shell
• Most will have a muscular foot that is used for movement, opening their shell or burying themselves in the sand
• The head region will usually contain mouth and sense organs such as eyes.
• A soft fold of tissue called the mantle covers most of the mollusks body
• The mantle produces the shell

Echinoderms

• An internal skeleton and Spiny skin
• Five part body plan
• A water vascular system
• Tube Feet

Answer 2

Cnidarians differ from mollusks because mollusks are defined as Bivalves. They are called Bivalves because they have two shells. Cnidarians such as Jelly Fish do not have shells which define a bivalve (mollusks).

Answer 3

Echinoderms are animals that are spiny skinned like:starfish, sea cucumbers, sea urchins, sand dollars, and brittle stars.

Mollusks are animals with very soft bodies, like cephalopods: squid, octopi, cuttlefish, gastropods: snails and slugs, and bivalves: clams, oyster, mussels, scallops, cockles.

~7th grader