All of them have soft muscular bodies that they use to move along the ground or through the water.
Nearly all of them have a shell.
Their body is full of holes, known as pores.
They have poisonous tentacles that they use to defend themselves.
They have a long soft segmented body that is made up of rings.
They can be very dangerous animals.
Some of them live in water.
This earthworm inside moist soil.
They are fixed to the ground so they cannot move around.
Some of them are terrestrial and live on land.
Food and water enter their body through these pores.
They live at the bottom of the sea.
They have many small feet that they use to move along the bottom of the ocean.
Starfish and sea urchins belong to this group of invertebrates.
Some of them are aquatic and live in water.
