000 species) have: soft, fleshy bodies a tongue-like organ called a radula a hard, external shell--usually Photo &#169; The Marine Biological Laboratory Cephalopods (about 1,000 species) have: well developed brains a circulatory system with three hearts, veins, and arteries ink sacs--usually no external shell--in most cases Photo &#169; Kerry L. Werry 1995 They: live only in the sea use jet propulsion can rapidly change skin color and texture--in most cases Squids (about 500 species) have: long, cylindrical bodies 8 arms and 2 tentacles--usually an internal, blade-shaped gladius fins Photo &#169; The Marine Biological Laboratory Can you find the cephalopod?
(They; live; L:only in the sea use jet propulsion; L:in most cases)
They
live
L:only in the sea use jet propulsion L:in most cases