These types of organisms do not have a backbone.
What are invertebrates?
Sponges use this method of feeding.
What is filter feeding?
Cnidaria in the polyp form reproduce asexually by this method which produces offspring that is genetically identical to the parent
What is budding?
This compass jellyfish beautifully shows this type of symmetry that cnidarians exhibit.
What is radial symmetry?
I am made to absorb, and I can hold liquid even though I’m full of holes. What am I?
What is a sponge?
This animal phylum contains animals such as the two seen here.
What is Chordata?
This is what the word "porifera" means.
What is "pore-bearing"?
This layer is located between the inner and outer tissue layers.
What is the mesoglea?
Jellyfish spend most of their life cycle in this body form.
What is medusa?
I am always running, but never get tired or hot. What am I?
What is a refrigerator?
They may not fit your typical definition of an animal, but animals in this phylum have bilateral symmetry and are made up of many segments.
Annelida
This protein supports the sponge's body.
What is collagen?
Cnidaria (and porifera) lack these specialized structures, such as a brain, lungs, stomach, etc.
What are organs?
You see me once in June, twice in November, but not at all in May. What am I?
Despite its lack of a hard shell, this octopus belongs in the same phylum as snails and scallops.
What is Mollusca?
These many-shaped cells give the sponge rigidity and help to identify the sponge.![]()
What are spicules?
This part of cnidaria performs similar functions as the stomach and intestines in humans.
What is the gastrovascular cavity?
Have you ever heard the story of Goldilocks? When your shoes are off what trait do you share with the animals the girl in the story bothers?
What are bare (bear) feet?
This living fossil, first seen 450 million years ago, doesn't look like its fellow crustaceans (and technically they aren't crustaceans), but turn it over to check out its legs and it definitely belongs in this phylum.

What is Arthropoda?
These cells line the inside of the sponge and use their flagella to pump water through the sponge.
What are choanocytes?
Cnidaria have this in place of a nervous system that aids in sensing stimuli and coordinating movement.
What is a nerve net?
This largest species of jellyfish can exceed the length of a blue whale.
What is the lion's mane jellyfish?
I am light and seem to have no substance at all. But even the strongest person in the world can’t hold me for very long. What am I?
What is breath?