While snorkeling you come across an organism that appears to be a mollusk. In an effort to identify the type of mollusk you make the following observations: fast moving, large eye. What type of mollusk do you believe you have found (bivalve, gastropod, or cephalopod)?

Question

agreene · Answer

bivalve == 2 valves, think clams (no eyes)
gastropoda == snails etc, (eyes but slow-moving)
cephalopoda == squid etc

anonymous · Answer

And squid are fast right?

anonymous · Answer

@agreene

agreene · Answer

indeed.

anonymous · Answer

Ok thank you

agreene · Answer

but, you can also look at it this way:  gastropoda are land animals, and bivalve dont have eyes.

agreene · Answer

I should say, mostly land animals

anonymous · Answer

Ok so I guess it only leads to the cephalopods because squids have long tentacles and large eyes.