Though it breathes through gills, the octopus is not a fish but a cephalopod marine mollusk. Also, unlike a fish, an octopus is an invertebrate, which means it doesn't have a backbone. It also has three hearts.Know More
The octopus is considered a mollusk because it has a mantle that holds the organs it uses for breathing and excretion and has a rasping tongue, or radula. The octopus also shares features of its nervous system with other mollusks. It has no bones, and the hardest part of its body is its beak.
The octopus is also a cephalopod because its large head is merged with its arms.Learn more about Octopi
Female octopuses reproduce by first fertilizing their eggs with the sperm from a male and then depositing and caring for her eggs. The young octopuses, however, must care for themselves. They must secure food and avoid predators in order to grow, mature and eventually reproduce themselves.Full Answer >
An octopus' coloration depends upon its surroundings. An octopus possesses the ability to alter its coloration depending on its immediate environment. This defensive technique protects the animal from predators and entices prey to come close to the animal.Full Answer >
A live octopus can be bought both in aquarium stores and ordered online to be delivered through the mail. Depending on whether you are hobbyist or a scientist, you can buy an octopus from various suppliers. Certain sellers only carry certain species of octopus, as well.Full Answer >
An octopus has eight legs, but they are more commonly referred to as tentacles. The name "octopus" is directly derived from the prefix "oct-" which means eight and is found in other words such as "octagon."Full Answer >