Yes octopus are hunted for food. Octopus are used in Mediterranean food, Caribbean food, and Asian food. Some octopus are eaten alive and animal rights groups argue that octopus should be killed humanly and then eaten.
An octopus get their prey by grabbing them with there tentacles. To catch there food easier, they camoflage with the ground or rocks. An octopus get their prey by grabbing them with there tentacles. To catch there food easier, they camoflage with the ground or rocks.
The answer to your question "what does the beak of an octopus do" is... The beak of an octopus helps it to eat. The tentacles help grab the food and then they put the food into it's beak. Don't ever touch the beak of an octopus. i is very sharp and can hurt you. (if it is still on an octopus)
Whales eat octopus [sperm whales have giant octopus as a favorite food]. Octopus eat each other octopus. Humans eat octopus. Anything that can catch an octopus (that isn't easy) will eat it. Killer whales [or Orcas, a kind of toothed whale] eat octopuses.
You can never be sure unless you have adequate information of the 'food' you are gathering or the place that you are gathering it from. You'll never be sure unless you have been previously taught by someone who really knows.
Concisely, food habit refers to the way in which different people select , cook, serve and eat food that are available to them. Food habits are disciplinary measures to eat a certain food or foods repeatedly every day. This usually coincides with diet and food disorders.