The Tree of Life Cladogram

CHARACTERISTICS: animals without a backbone; most have shells and a hard-toothed feeding structure called a radula
KNOWN SPECIES: approximately 81,000
SIZE RANGE: .04 inches to 59 feet (1 millimeter to 18 meters)
WHERE THEY LIVE: in oceans, fresh waters, and in moist land areas

Here are just SOME of the world's mollusks: Chambered nautilus
Photos are not actual size! Purple ring top snail
Purple ring top snail Spanish shawl nudibranch Opalescent inshore squid
Robust lancetooth
Cuttlefish tidewater mucket
Greater Blue-Ringed Octopus
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Greater Blue-Ringed Octopus