According to National Geographic, the common octopus preys on crabs, crayfish and molluscs. Bottom-dwelling octopuses feed mainly on polychaete worms, crabs, whelks and clams. Open-ocean octopuses subsist on prawns, fish and other cephalopods. The giant Pacific octopus feeds on shrimp, clams, lobsters and fish, and even larger prey, such as sharks and birds.Know More
Octopuses hunt at night and usually inject their pray with a paralysing saliva before using their sharp beak to dismember them into small pieces. To access the meat of shelled creatures, octopuses sometimes drill a hole into the shell and inject a secretion through the hole before extracting the mollusc's soft body. Sometimes the shells can be pried open using force.
Octopuses are known for their intelligence and problem-solving skills, and it is believed they are the smartest of all invertebrates, according to About.com. They have unique defense mechanisms, with the most frequently used being their ability to hide with camouflage. This allows an octopus to match the colors, patterns and textures of its surroundings. Octopuses also have the ability to squirt a thick cloud of ink, and escape very quickly using jet-like propulsion. Because they have soft, boneless bodies, octopuses are able to manipulate themselves to fit into very small crevices and cracks.Learn More
Sharks, killer whales and tuna are the main eaters of the dumbo octopus. Since it spends much of its life at depths ranging from 1,300 feet to more than 20,000 feet, the octopus does not have many predators.Full Answer >
Octopuses vary in size according to species, but the common octopus grows between 12 and 36 inches in length and weighs up to 22 pounds. The giant Pacific octopus is the largest of member of the octopus family and can weigh more than 150 pounds.Full Answer >
Crocodiles are ambush hunters. Their diets include dragonflies, fish, turtles, frogs, birds and mammals. The size of the crocodile determines the size of its prey.Full Answer >
The main predators of the Dumbo octopus are killer whales and sharks. Because Dumbo octopuses spend most of their lives at great depths, the species does not have many predators.Full Answer >