Matching Pairs InvertebratesOnline version Learn more about invertebrates by Luz Álvarez Herrero 1 MOLLUSCS 2 ARTHROPODS 3 ECHINODERMS 4 JELLYFISH 5 SPONGES 6 ANNELIDS They are the most common group on Earth. The biggest group are insects. Example: crab, ladybug They stay on the seabed Soft body called umbrella and long tentacles They are protected from predators by hard skin or spikes Examples: Starfish They have a long, soft body divided into segments. Example: Earthworm They have a soft muscular body Examples: snail and octopus