Simple Animals
These are the thorny spikes on a sponge that serve as its defense.
What are spicules?
This sea animal looks like a rubbery cup with two openings.
What is a sea squirt?
This is a blood-sucking parasite with two suckers.
What is a leech?
These "wheel" animals were discovered in the 1600s.
What are rotifers?
Adult sponges are this because they stay in one place.
What is sessile?
The larva form of a sea squirt resembles that of this amphibian.
What is a tadpole?
This type of worm has tiny hairs on each segment.
What is a bristle worm?
This is the nickname of a tardigrade.
What is a water bear?
Sponges are considered this kind of feeder because they clean the ocean.
What is a filter feeder?
Sponges reproduce from a fertilized egg, budding, or this method common with sea stars.
What is regeneration?
The phylum platyhelminthes includes this type of worm that is not segmented.
What are flatworms?
A tardigrade enters this state to survive when drying up.
What is tun?
This is a sponge's outer layer of skin full of holes.
What is a pinacoderm?
A sea sponge is often mistaken for this kind of cnidarian.
What is a coral?
This type of worm builds its own protection from freezing, hot, or toxic water.
What is a tubeworm?
A tardigrade has these in their mouth for piercing creatures.
What are needles?
This is the large hole at the top of a sponge.
What is an osculum?
Sponges belong to this phylum whose name means "pore-bearer."
What is Porifera?
This phylum includes segmented worms.
What is Annelida?
"Wheel" animals flaps these hair-like structures to draw food into its mouth.
What is cilia?