The octopus is unique for its appearance with its 8 arms, massive bulbous head, and large eyes. And there are lots of things about octopus that we don’t know. So here we come up with a list of octopus questions and answers.
Is an octopus a fish? Is an octopus a mammal?
No. Mammals are animals that use lungs to breathe and give birth to live young, which they feed milk. An octopus has gills instead of lungs and lays eggs – from a few dozens to hundreds of thousands.
And no, the octopus isn’t a fish, either. All fishes have backbones and gills and most of them have scales and are cold-blooded (they take on the temperature of their environment). While octopuses have gills and are cold-blooded, they do not have backbones or scales. In fact, octopuses have no bones. They have skin that can be covered by bumps or spikes. They also have a more complex nervous system than fishes.
Instead, an octopus is a mollusk, making it related to clams, oysters, slugs and snails. Specifically, it is a cephalopod, which is the combination of the Greek words for “head” and “feet”. Cephalopods, after all, have a large head and many feet. Other cephalopods include squid and cuttlefish.
Where does octopus live? Where do octopi live?
Octopuses can be found all over the world, in both warm waters and cold waters, near shorelines and in open oceans, in reefs and on the ocean floor. Their size, features, abilities and lifestyle change depending on the nature where they live.
What do octopus eat? What does octopus eat? What do octopi eat?
A bottom-dwelling octopus or an octopus that lives on the ocean floor will eat crabs, clams, sea snails and bristle worms, sea worms that are covered in tiny tentacles that look like the bristles of a toothbrush.
An octopus that lives in the open ocean eats mostly fish, prawns, and smaller squid and cuttlefish, even smaller octopuses.
When eating shellfish, an octopus first drills a hole into the shell or pries it open using its strong beak, then injects a deadly dose of venom, which is mixed with its saliva. When eating fish, they pounce on it, using their arms like a net and trapping it, or they grasp it using their powerful arms, then they inject it with venom before eating it.
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