science

short answer

100

plant eater

herbivore

200

2 matching fan shaped shells joined by hinges

bivalves

300

mini invertebrates made up of one cell such a amoebe or paramecium

protozoans

400

smallest living organism made up of cell membrane cytoptsm and nucleus

cell

500

threadlike structure in a cells nuculeus that contains the instruction of running  the cell and making needed parts

chromomes

short answer

100

flesh eater

carnivore 

200

one shelled mollusks

univalves

300

foot & head combined into a singal headlike sructrue

cepholopods

400

thin flexible covering that encloses the cell and protects it

cell membrane

500

tiny hairlike structrues that cover a pramcium and allow it to swim

cillia

what am I

100

smallest crab ¹₄ to ¹₂ inches long

                   

pea crab

200

largest crab weighs up to 40 lbs nearly 5' long

Japanese spider crab

300

from Alaska popular sea food dish

king crab

400

eastern us popular sea food dish

blue crab 

500

long antenna short antenna cephalathorax carapace abdomen compound eyes walking legs swimerets

crayfish

what am I

100

sand colored fast runner 

ghost crab

200

popular pet lives in snail shells

hermit crab

300

enomus pincres meaty tail 3'' length sea food dish

American lobster

400

no pincers antennas are long with sharp edges

spiny lobster

500

one of the smallest shimp unique feet "gill feet"

brine shrimp

what am I

100

one large pincer

pistol shrimp 

200

long antenna

cleaner shrimp

300

rock like

barnacle

400

crustacean lives on land 

wood louse

500

rolly poly roos into a ball

pill bug