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MOLLUSKS & ECHINODERMS

Across
An ________ is the only Mollusk without a Shell.
A group of organisms that only live in salt water and whose name means "spiny skin'" are the __________.
In Mollusks water passes in and out, and passes over the ______.(75)
Mussels, Scallops, Squid and Snails are classified in this Phylum, _______.
Down
A starfish has five arms or_____ that extend from a central disc. (75)
The Clam and Snail move by means of a ______foot. (75)
Common examples of Echinoderms include the sea urchin, sea cucumber, sea lily and the _________. (75)
Certain sea urchins have ______________spines. (76)
The "________" is a Mollusk that are harmful because they bore through the wood of ships and piers . (75)
_______produce pearls when sand becomes lodged between the mantle and the shell.