Mollusks with tentacles are cephalopods. Cephalopod in Latin means, "Head-foot".
There are about 3,300 various species of cephalopod, including octopuses, squids, cuttle-fish, and nautiluses.
Sizes range from the tiny Wolfi octopus, about the size of 1 1/2 sugar cubes, to the architeuthis Colossal Squid, larger than a giant squid, whose full-grown length is up to 46 feet, or perhaps even longer. The giant squid runs from about "only" 33 feet to 42 feet, full-grown.
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