Yes they do in certain areas of the world. I remember going to Spain and seeing them for sale in an average fish monger shop. They're eaten in warmer, coastal countries where fishing is abundant.
yes
yes!
no
no there are not smarter then humans but there close
yes
people and other octopuses
Usually octopuses eat crabs, clams and some other fishes too.
Octopuses eat shrimp, lobsters, crabs, snails and sometimes fish and other octopuses. Most octopuses hunt at night when their pray is sleeping.
no
jamaca we have a bobsled team
yes
they dont
Through the vibrations of the water or earth.