What group does an octopus belong to?
Cephalopod
Cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives.
Is squid a vertebrate?
invertebrate, any animal that lacks a vertebral column, or backbone, in contrast to the cartilaginous or bony vertebrates. Worldwide in distribution, they include animals as diverse as sea stars, sea urchins, earthworms, sponges, jellyfish, lobsters, crabs, insects, spiders, snails, clams, and squid.
What class of invertebrates is octopus?
Cephalopoda
Squid and Octopi – Smart Cephalopods Octopi mainly. They rock. The basics are that they are mollusks like clams and snails but in a class called Cephalopoda (the cephalopods). They are the most intelligent of any invertebrate, even compared to spiders and crustaceans.
Do octopus bite humans?
Octopus bites can cause bleeding and swelling in people, but only the venom of the blue-ringed octopus (Hapalochlaena lunulata) is known to be deadly to humans. Octopuses are curious creatures and generally not aggressive toward people.
Is the octopus considered to be a vertebrate or an invertebrates?
Octopuses are a species of mollusc, and as such are invertebrates. In fact, they have a body without any bones at all. This is a benefit to the animal because it enables them to squeeze into nooks and crannies that seem impossibly small for them.
Do you have a spine in an octopus?
No. Because an octopus has no internal skeleton or spine/back bone, it is classified as an invertebrate.More information:The octopus is a mollusk, a grouping with many various characteristics. Squid are also mollusks. Both fit into the definition of invertebrates because they do not have an internal skeleton with a spine.
What kind of beak does an octopus have?
Octopuses have a hard beak, which they use to pierce the shells of crustacean prey. Octopuses have three functioning hearts. Two of the hearts work exclusively to move blood to the gills, while the third pumps blood through the rest of the body.
How long does an Octopus live in the ocean?
An octopus will generally live for about one to three years, depending on the species. Octopuses are spread throughout a large ocean area and are solitary, which makes it difficult to determine the status of their populations. They are not believed to be under threat, but they are sensitive to pollutants.