Examples of cephalopods include octopuses, nautiluses, squid, spirulas and cuttlefish. Cephalopods are found in all of Earth's oceans, either on the seabed or in open water.Continue Reading
Octopuses range in size from the tiny California octopus to the giant octopus, which can weigh 400 pounds and has arms up to 23 feet long. Octopuses are venomous, have eight arms, rounded bodies, good eyesight and are surprisingly intelligent.
Squid have eight arms plus two appendages that help them capture prey. Schools of squid are found in the cold waters off Antarctica, where they eat krill and are in turn eaten by whales, seals and humans. The 46-foot-long giant squid is one of the largest cephalopods on Earth.
The chambered nautilus' shell is full of gas-filled compartments that allow the animal to remain buoyant. In the meantime, the animal's body is contained in the last compartment. The nautilus may have as many as 90 tentacles, though unlike the squid and octopus, these tentacles have no suckers.
The spirula is a squid-like creature that lives in a spiral shell that resembles a ram's horn. It's seldom encountered because it lives deep in the ocean.
The cuttlefish, which resembles a shell-less nautilus, is famous for its spectacular ability to change not only the color of its skin, but also its texture. They do so to hypnotize prey, challenge rivals and impress potential mates.Learn more about Marine Life
The narwhal, a medium-sized whale with a long tooth that looks like a unicorn's horn, feeds on fish that swim in Arctic seas such as Greenland halibut, arctic cod, polar cod, squid, shrimp and cuttlefish. Because narwhals do not have well-developed teeth, they swim close to their prey and suck it into their mouths.Full Answer >
Moray eels eat fish, crab and mollusks, such as cuttlefish, octopus, squid. They also eat other eels. Moray eels are ambush predators that hide in coral or rock crevices until a prey animal comes by. Only their heads protrude from the crevice, and their opened mouths are camouflaged.Full Answer >
There are approximately 300 different octopuses in the world today including the greater blue-ringed octopus and the common octopus. Scientists are finding more and more that studies show octopuses as sentient beings.Full Answer >
The website What Eats states that numerous predators eat shrimp, including fish, birds, flamingos, insects, insect larvae, squid, octopuses and humans. Most shrimps are tiny, and they have a large number of natural enemies that feed on them.Full Answer >