This smoke screen allows the octopus to make a disappearing act. Its main enemies are the moray eel and large fishes. In an emergency the octopus can also escape a predator by jet-propulsion, it can squirt a blast of water out of its siphon to escape. Octopuses have well-developed eyes, similar to our own. They are sensitive to low light for hunting at dawn and dusk.
Octopuses are the most intelligent of all the invertebrates.
With a well-developed brain, octopuses can learn tricks as easily as a dog. Octopuses are active at dawn and dusk, leaving their den to hunt. They blend into their surroundings and grab passing prey with their long arms. Octopuses feed on crabs, snails, clams, small fishes and shrimps. Tidy eaters, they leave neat piles of shells outside their den, called a midden.