Do octopus eat plankton?
No, Octopuses eat small crabs and scallops, plus some snails, fish, turtles, crustaceans (like shrimp), and other octopuses. They catch prey with their arms, then kill it by biting it with their tough beak, paralyzing the prey with a nerve poison, and softening the flesh. They then suck out the flesh. Octopuses hunt mostly at night. Only the Australian Blue-ringed octopus has a poison strong enough to kill a person. I once saw a programme where sharks were going missing in an aquarium, it turned out to be an octopus catching and eating them, but no, the do not eat plankton.