Arthropod species
Evolution
100

smallest marine arthropod 

shrimp

100

millions of cells

multicellular 

200

8 legs, flat top shell

crab

200

ectoderm,endoderm, mesoderm

3 tissue layer.

300

biggest marine arthropod 

lobster

300

if split in half same on both sides 

bilateral symmetry

400

long arms, long skinny tail

scampi

400

soft bendable body parts allowing them to move

jointed legs

500

claws, tales, antenna

spiny lobster

500

parts of the body that has segmented parts allowing them move.

segmentation.