Invertebrates

simplest invertebrates

corals

sponges

jellyfish

Echinoderms

sea urchins

sea star

salt water have body parts in multiples of five

click to edit

click to edit

click to edit

click to edit

Arthropods

click to edit

crustaceans

exterior shell, five pairs of jointed limbs

spiders

two body segments, eight legs

insects

antennae jaws three body segments

more complex invertebrates

Mollusk

have shells for protection

squid

have internal shell

octopi

do not have shell at all

click to edit