They eat megasharks. I saw it on this documentary called megashark vs giant octopus.
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
yes
they dont
the like to eat clams
Sure, they can.
Goblin sharks, viper fish, angler fish, gulper eel
The main enemies of the Japanese Spider Crab are octopuses, large fish, and occasionally humans who catch them for food. These crabs have a hard exoskeleton which provides protection against predators, but they are still vulnerable during molting when their shells are soft.
Octopuses eat pretty much whatever they like. They may not target clownfish but they will eat them if they want.
No because you can't 'eat' water, you can only drink it.