Spiny-bodied Animals

1. They use there tubular feet to use there mussel.
2.They can  move things, and they capture food.
3. There are 6,000 kinds of spiny bodied fish in the whole world.
4. Some can live by land.

sea urchin

star fish

brittle star

prickly sea cucumber

5. These animals have suction cups and mouths to help them breathe.

Arthropods

a headlice or mite  is an arachnid.

a cicada is an insect

a locus is an insect.

a crayfish is a crustacean.

1.Arthropods have have these cells  that form tissue and organ systems.
2.They can have different groups called arachnids, insects, crustacean, and myriapod.
3. These animals were the first land animals made in the world.
4. They have a exoskeleton that helps them from there organs.
5. Some have wings, legs, claws,and tails. 

Segmented Worms

1. Segmented worms have a have eyespots like flatworms and roundworms.
2. They can digest there foods.
3. Segmented worms have a system of blood.
4. 510 million years ago segmented worms were evolving with fish.

sandworm

leeches

earthworm

5. They live in water,dirt,or on the ground. 

Mollusks

1. Some mollusks don't have shells and some do.
2.  There are 100,000 species of mollusks that are around in different places.
3. Mollusks have have an open circulatory system.
4.  Mollusks are part of the endangered species.

clam on sand

squid in water

octopus in box

5.Mollusks have a muscular foot that helps them move.

Roundworms

1. Roundworms can live in animal,humans, and in the oceans too,but they can also be in food products.
2. They also can contain very serious diseases and other types of problems.
3. Roundworms are free-living species and scientists think they are only a small portion of all species of roundworms.
4. There very flexible because they have no backbone.

a roundworm

5. They are very nasty worms they can go inside you.

Flatworms

planarian

tapeworm upclose

fluke flatworm

1. Flatworms are really weird animals because they are inside us and animals  they eat food that comes from our(and there) stomach also they aren't supposed to be inside you.
2. They are more complex than sponges and sting- celled animals.
3. They are also scavengers that means they things that are dead.
4. They have form tissues that can sense things around.
5. There organs digest by doing food,and other materials.   

Sting - Celled Organisms

sea jelly

hydra

anemones

a coral

1. Stinging-celled organisms can regenerate there  bodies  but they can't regenerate there whole  body.   
2. They have hollows inside there layers of cells and they can have a salt water or fresh water habitats.
3. They can sting you and can hurt you like very bad.Or you could die from one.
4. There are ways they can get there preys they can trap it by using it's tentacles.
5. They are very easy to find in oceans.