Octopus Facts: Habitat, Behavior, Diet
Octopus, in general, any eight-armed cephalopod mollusk of the order Octopoda. The true octopuses are members of the genus Octopus, a large group of widely distributed shallow-water cephalopods. Learn more about the anatomy, behavior, and reproduction of octopuses in this article. Dec 13, · Scientific Name: Octopus, Tremoctopus, Enteroctopus, Eledone, Pteroctopus, many others Common Name: Octopus Basic Animal Group: Invertebrate Size: >1 inch–16 feet Weight: >1 gram– pounds Lifespan: One to three years Diet: Carnivore Habitat: Every ocean; coastal waters in every continent Population: There are at least species of octopuses; population estimates are not .
The term blue-ringed octopus does not merely refer to a single species, but a genus of species that are marked by bright blue circular patterns.
Despite their apparent gentle nature, wnat small molluscs are known to be one of habotat most venomous and dangerous sea creatures on the planet. An adult blue-ringed octopus is of the size of a golf ball, but if provoked, they can bite attackers, including humans. A single bite might lead to partial or complete paralysis, blindness, loss of senses, nausea, and resultant death within minutes, if left untreated.
No blue-ringed octopus habitqt has yet been discovered. Blue-Ringed Octopus. Size: The wht size of these animals can be cm lengthwise from the top of the mantle to the tip of the arm. Rings and Patches: They are what does a pivot joint do covered with blue rings along the dorsal hahitat the lateral surfaces of the mantle. Eyes: These molluscs have two well-developed eyes similar to those of the vertebrates.
Tentacles: Like other octopuses, they have four pairs 8 of tentacles attached around their mouths. The lengths of the arms vary between 7 and 10 cm and are covered with suckers. Skin Mantle Color: Yellowish to bright yellow skin with bluish to bright blue rings or lines depending on the sub-species. Color changes from light to brighter shades when threatened. Mainly recognized as an Australian species, they are widely spread around the southern part of New South Wales and South Australia, and northern Western Australia.
The BRO mainly dwells in q temperate waters of the coral reefs and in the tide pools, at a depth varying from meters or sometimes 50 meters. Here are the different species, along with their scientific names and descriptions:. These marine creatures are not aggressive animals. They hide in crevices or under rocks during daytime for gaining protection, and emerge at night.
The main motto ks changing its body color is to exhibit its toxicity and si predators and attackers. These octopi use their dermal chromatophore cells to camouflage themselves. Like most other octopi, it flattens out its body on the bed for hiding from its enemies.
Furthermore, octoppus changes its body color in order to blend into its surroundings. They are bottom dwellers, inhabiting sandy and silty areas, and would even live inside empty sea shells, discarded bottles, and cans. The BRO will come octpous of its shelter only to hunt for food or to search for a mate. The BRO lives by primarily feeding on crabs, shrimps, and other invertebrates. However, it also consumes wounded fish, or else live, if it can catch them. They what is a octopus habitat on the prey and invade it with by its tentacles and pulling it towards their mouth.
They then paralyze the prey by its venom while piercing its beak through the exoskeleton. The blue ring octopus has strange sexual behaviors. The modified arm is then inserted into the oviduct of the female and spermatophores are released. The male octopus dies after mating. The female octopus lays only a single clutch of eggs in her whole habitxt, with the clutch containing of about eggs. The female protects the eggs under her arms for a period of almost six months.
It octous soon after the hatchlings come out, since it does not consume any food during incubation. The hatchlings are born tiny, about the size of a pea. They are sexually matured whag active within a year and are able to mate by the following autumn. The ink sacs present in the other octopi exist in the juveniles of the species, but the sacs greatly reduce in size, as they grow older.
The biggest predator of what is the average height of an asian woman blue ring octopus is the moray eel. Other predators also include whales, seals, and different types of shore and marine birds. The BRO is also not safe from human predation. Owing to its bad reputation, these creatures, if found, are frequently killed by people. These creatures do not appear in wat list of the IUCN.
Your email address will not be published. All rights reserved. Reproduction in whole or in part without permission is prohibited. Blue-Ringed Octopus Pictures. Blue-Ringed Octopus Eyes. Blue-Ringed Octopus Habitat. Blue Ringed Octopus Photos. Blue-Lined Octopus. Southern Blue-Ringed Octopus. Greater Blue-Ringed Octopus. Blue Ring Octopus. Blue-Ringed Octopus Images. Blue-Ringed Octopus Baby. Blue-Ringed Octopus Eggs. Blue-Ringed Octopus Bite. Blue-Ringed Octopus Size. Flapjack Octopus. Red Rock Crab.
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The octopus is a mollusk and an invertebrate, which means it has no bones in its body. For more fascinating facts about octopus, click to see the comprehensive fact file. Alternatively, why not download our comprehensive worksheet pack to utilise within the classroom or home environment. The common octopus (Octopus vulgaris) is a mollusc belonging to the class Cephalopoda. Octopus vulgaris is the most studied of all octopus species. It is considered cosmopolitan, that is, a global species, which ranges from the eastern Atlantic, extends from the Mediterranean Sea and the southern coast of England, to the southern coast of South niceloveme.com also occurs off the Azores, Canary. Habitat: Where do Blue-ringed Octopuses live. The BRO mainly dwells in the temperate waters of the coral reefs and in the tide pools, at a depth varying from meters (or sometimes 50 meters). Blue-Ringed Octopus Habitat. Blue Ringed Octopus Photos. Classification of Species.
Octopus , plural octopuses or octopi , in general, any eight-armed cephalopod octopod mollusk of the order Octopoda. The true octopuses are members of the genus Octopus , a large group of widely distributed shallow-water cephalopods.
See cephalopod. Octopuses vary greatly in size: the smallest, O. The typical octopus has a saccular body: the head is only slightly demarcated from the body and has large, complex eyes and eight contractile arms. Each arm bears two rows of fleshy suckers that are capable of great holding power. The arms are joined at their bases by a web of tissue known as the skirt, at the centre of which lies the mouth. The latter organ has a pair of sharp, horny beaks and a filelike organ, the radula , for drilling shells and rasping away flesh.
The octopus takes water into its mantle and expels the water after respiration through a short funnel or siphon. Most octopuses move by crawling along the bottom with their arms and suckers, though when alarmed they may shoot swiftly backward by ejecting a jet of water from the siphon.
When endangered they eject an inky substance , which is used as a screen; the substance produced by some species paralyzes the sensory organs of the attacker. The best-known octopus is the common octopus , O. It lives in holes or crevices along the rocky bottom and is secretive and retiring by nature. It feeds mainly on crabs and other crustaceans. This species is thought to be the most intelligent of all invertebrate animals.
Each pigment-bearing cell chromatophore is individually innervated from the brain. The veined octopus Amphioctopus marginatus is also known for its intelligence. In biologists reported having observed the animals excavating coconut half shells from the ocean floor and carrying them for use as portable shelters. Such behaviour is regarded by biologists as the first documented example of tool use by an invertebrate. During the four to eight weeks required for the larvae to hatch, the female guards the eggs, cleaning them with her suckers and agitating them with water.
Upon hatching, the tiny octopods, which closely resemble their parents, spend several weeks drifting in the plankton before taking refuge on the bottom. Octopuses feed mainly upon crabs and lobsters , although some are plankton feeders, and they are fed upon by a number of marine fishes. They have long been considered a culinary delicacy by peoples of the Mediterranean, East Asia, and other parts of the world.
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LiveScience - Octopus Facts. Articles from Britannica Encyclopedias for elementary and high school students. The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree See Article History. At rest, the common octopus Octopus vulgaris blends into its surroundings.
Read More on This Topic. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. The extinct forms outnumber the living, the class having Day octopus Octopus cyanea. Blue-ringed octopus genus Hapalochlaena. The common octopus Octopus vulgaris moving through water. Know how colorblind cephalopods like octopuses and squids know what colors to change to hide from predators or to attract mates.
How do "colour-blind" octopuses know what colour to change to in order to hide from predators or to attract mates? The common octopus Octopus vulgaris may blanch when agitated. Get a Britannica Premium subscription and gain access to exclusive content.
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Learn how a traditional Greek dish of octopus and tomato sauce is made. Follow researchers into the waters off Vancouver Island in search of the giant Pacific octopus. Join researchers on a hunt for the giant Pacific octopus. Dumbo octopus Grimpoteuthis species. Learn More in these related Britannica articles:. The extinct forms outnumber the living, the class having attained great diversity in late Paleozoic and Mesozoic times.
The extinct cephalopods are the ammonites, belemnites, and nautiloids, except for five living species of Nautilus. During this period she aerates the egg clusters and keeps them free of detritus, exhibiting remarkable behaviour for an animal that produces…. However, because there is no lens and each photoreceptor must cover a wide angle of the field of view, the image in the Nautilus eye is of very poor resolution.
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