Shell-ebrate Good Times
Filter Feeder Fun
The Sting Operation
Squirmy and Slimy
Ocean Floor All-Stars
100

A mollusk with two shells that are held together by powerful muscles.

Bivalve

100

True or False: Most sponges live in freshwater.

False. Most live in saltwater.

100

The type of cnidarian that forms reefs.

Coral

100

A worm that has ring-like segments on the outside of its body.

Segmented Worm

100

Bulblike suction structures lining the arms of an echinoderm.

Tube Feet

200

An ocean mollusk with a head, tentacles, and beaklike jaws.

Cephalopod

200

The parts of a sponge include the flagella, the collar cells, the osculum, and the ___________________.

Spicules

200

The only freshwater cnidarian

Hydra

200

A worm with an unsegmented body that moves by flipping or bending.

Round Worm

200

Symmetry of adult echinoderms.

Five-part radial symmetry

300

A mollusk with a single shell or no shell, and a foot for movement.

Gastropod

300

These line the inner chamber of a sponge.

Collar cells

300

A cnidarian with a bowl-shaped body

Medusa

300

A worm with a soft, ribbon-shaped body, a mouth, and a gut.

Flatworm

300

How does a sea cucumber defend itself?

Spews out its intestines.

400

A mollusk's hard, strong band scrapes food or bores into objects.

Radula

400

Undigested food and carbon dioxide exit the sponge through one or more larger openings called ________________.

Oscula

400

A polyp cnidarian that looks like a flower.

Sea Anemone

400

The 3 groups of worms that are studied the most.

Flatworms, roundworms, and segmented worms.

400

This echinoderm can easily snap off one of its arms to escape predators. 

Brittle Star

500

This cephalopod injects saliva into its prey to paralyze it.

Cuttlefish

500

Name the two ancient civilizations that padded their helmets and armor with sponges.

Ancient Greeks and Romans

500

A special stinging cell on a cnidarian's tentacles

Nematocyst

500

Why must earthworms remain moist?

Because oxygen and carbon dioxide pass directly through their skin, but only if it is moist.

500

What do the Scarecrow from the Wizard of Oz and an echinoderm have in common?

They both lack a brain