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Mollusca

Across
Used as a "trap door" to close the body inside the shell.
Have 8 arms with sucking disks that grab and hold prey.
The largest gastopod
Internal gas filled "bone" that helps with buoyancy
Many are_____ to attract prey and mating partners.
Special pigment cells contained within its skin.
"Naked gill"
Can weigh 600lbs
The most toxic octopus.
"living octopus"
Down
Are herbivores, carnivores, filter feeder, detritivores and parasites.
A cord of living tissues.
Such water reduces light penetration for photosynthesis in sea, grasses, and algae.
Color changes are used for
Material used to produce the lining of its shell.
Clams, Oyster, Mussels, & Scallops.
Feed on giant squid.
"Stomach Foot"
The largest invertebrate
More than 90 arms.