Octopus and squid
Slow & Steady (Snails & Slugs
Two-Shell Wonders (Bivalves)
Mollusk Anatomy
Random Mollusk facts
100

How many arms does an octopus have?

8

100

What do you call a snail that doesn't have a shell? 

A Slug.

100

This sea animal lives in two shells and is famous for making pearls.

Oyster.

100

Most mollusks use this muscular "body part" to crawl or dig.

The foot.

100

Because they have no backbone, mollusks belong to this large group of animals.

Invertebrates. 

200

What dark liquid do these animals squirt to distract predators?

Ink

200

Snails leave behind this sticky trail to help them move smoothly. 

Slime (or Mucus).

200

 Clams, oysters, and mussels are called this because they have "two shells." 

Bivalves.

200

This hard structure protects the soft bodies of snails and clams. 

A shell.

200

 Most mollusks live in this type of habitat.

The Ocean (or Marine Environments).

300

This giant mollusk has eyes the size of beach balls

Giant Squid

300

A snail's eyes are usually located on these long, wiggly stalks. 

Tentacles.

300

This type of bivalve can "swim" by quickly clapping its shells together. 

Scallop.

300

This thin layer of tissue sits under the shell and actually creates it.

The Mantle.

300

The word "mollusk" comes from a Latin word that means this.

Soft.

400

Unlike humans, an octopus has this many hearts. 

Three.

400

This is the French word for a cooked land snail, often served with garlic butter. 

Escargot.

400

Bivalves don't have a head; they get food by straining it from the water, a process called this. 

Filter feeding.

400

Instead of a tongue, many mollusks have this ribbon of tiny teeth.

A Radula.

400

This "shell-less" mollusk is known for its beautiful, bright colors in the ocean.

Sea Slug (or Nudibranch).

500

What color is an octopus's blood?

Blue.

500

True or False: Some snails can sleep for up to three years. 

True.

500

The two shells of a bivalve are held together by this flexible part. 

A Hinge.

500

This is the "beak-like" mouthpart found on octopuses and squids.

A Beak.

500

What kind of body symmetry do all mollusks have?

Bilateral symmetry (meaning both sides look the same).