Groups

97% of all animals on earth are invertebrates and they live everywhere!

There are lots of different invertebrates.Scientists discover new invertebrates everyday!

The most common groups ofInvertebrates are…

Mollusks

Jellyfish

Sponges Echinoderms

AnnelidsArthropods

MollusksMollusks have a soft and muscular body,

sometimes protected by a shell.Some mollusks live on land.

Snail Slug

Some mollusks live in the sea.

Mussels

Clams

Octopus

Nautilus

Squid

JellyfishThey have a soft body called umbrella and often

long tentacles.Their mouth is their anus too!

They live in the sea.There’s a lot of types of jellyfish!

SpongesThey have soft bodies covered with little holes.

They can’t move.They take oxygen and food through the holes.

There are lots of species of sponges.

EchinodermsThey have a soft body protected by spikes or hard

skin.They often have bright colours.

They have a lot of arms.They live in the sea.

Starfish

Sea Urchins

AnnelidsThey have a soft, long body, often divided into

segments.

earthwormleech

ArthropodsAlmost all animals on earth are arthropods.

They live in the water, on land and in the air.They have head, thorax and abdomen,

Jointed legs and an exoskeleton.

Insects are arthropods

Ant

Wasp

Mosquito DragonflyFlyGrasshopper

Butterfly

BeeLadybird

Praying MantisCricket

Arachnids are arthropods

Tarantula

SpiderScorpion

Crustaceans are arthropods

Crab

Lobster

Shrimp

Myriapods are arthropods

Milipede Centipede