State three differences between snail and starfish features

Starfish have five arms and live underwater don’t have a shell have no antenna and eat by throwing their stomach out and trapping its prey in it I am not sure about the last one tell me if i am correct

Starfish can sometimes be predators to snails. Starfish are marine invertebrates, and they can regenerate injured or amputated limbs. Although starfish have no brain or blood, females are capable of producing up to 65 million eggs at once.
Snails are gastropod mollusks, and the average garden snail only produces about 80 eggs at once. 

Becuase there red blood cells become larger when stuck with sickle cell, thus causing blood clots, thus stopping the spread of malaria to the vital organs, and killing the victim.